Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.
FOOD FOR ASTRONAUTS
            It used to be thought that people could not swallow well in space, so the food (6)………for astronauts consisted of bite-sized pieces of food pushed out of tubes. But now it is known hthat you can eat in space in the same way as on Earth.
            The physical constraints lie in the body of the spaceship rather than the body of the astronaut. Limited storage and cooking facilities, with no space or power to (7)………for complex food preparation, mean that the (8)……… for space nutritionists has gone beyond providing astronauts with food that is palatable and good for them. The solution has emerged in the (9)………of dehydrated foods. Simply add water to the freeze-dried granules and ………bon appetit!
            With space flights often (10)…………..more than a week, astronauts cannot live on granules alone. They also take pre-cooked meals (11)…….. in bags, which they warm up in a small oven. These are tastier than granules but, according to Dr. Helen Lane, a research nutritionist, it is difficult to get astronauts to eat as much as they need. It’s partly that they are so busy but also because there is no (12)………to eat.” So tickling their taste buds is an (13)……….struggle, especially since one of the effects of zero gravity is to  reduce the sense of smell.
            Weightlessness is an important (14)……….in space food because of the danger that the food might fragment and float off in different (15)……….. We need foods that coalesce,” says Dr. Lane. Yoghurts, puddings, sauces all hold together in large droplets. Your spoon may float away, but the food will stay on it.”
(8)
A.uphill  
B.intense
C.anxious          
D.impossible

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.
FOOD FOR ASTRONAUTS
            It used to be thought that people could not swallow well in space, so the food (6)………for astronauts consisted of bite-sized pieces of food pushed out of tubes. But now it is known hthat you can eat in space in the same way as on Earth.
            The physical constraints lie in the body of the spaceship rather than the body of the astronaut. Limited storage and cooking facilities, with no space or power to (7)………for complex food preparation, mean that the (8)……… for space nutritionists has gone beyond providing astronauts with food that is palatable and good for them. The solution has emerged in the (9)………of dehydrated foods. Simply add water to the freeze-dried granules and ………bon appetit!
            With space flights often (10)…………..more than a week, astronauts cannot live on granules alone. They also take pre-cooked meals (11)…….. in bags, which they warm up in a small oven. These are tastier than granules but, according to Dr. Helen Lane, a research nutritionist, it is difficult to get astronauts to eat as much as they need. It’s partly that they are so busy but also because there is no (12)………to eat.” So tickling their taste buds is an (13)……….struggle, especially since one of the effects of zero gravity is to  reduce the sense of smell.
            Weightlessness is an important (14)……….in space food because of the danger that the food might fragment and float off in different (15)……….. We need foods that coalesce,” says Dr. Lane. Yoghurts, puddings, sauces all hold together in large droplets. Your spoon may float away, but the food will stay on it.”
(7)
A.hunger            
B.stimulation
C.provocation
D.longing

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.
FOOD FOR ASTRONAUTS
            It used to be thought that people could not swallow well in space, so the food (6)………for astronauts consisted of bite-sized pieces of food pushed out of tubes. But now it is known hthat you can eat in space in the same way as on Earth.
            The physical constraints lie in the body of the spaceship rather than the body of the astronaut. Limited storage and cooking facilities, with no space or power to (7)………for complex food preparation, mean that the (8)……… for space nutritionists has gone beyond providing astronauts with food that is palatable and good for them. The solution has emerged in the (9)………of dehydrated foods. Simply add water to the freeze-dried granules and ………bon appetit!
            With space flights often (10)…………..more than a week, astronauts cannot live on granules alone. They also take pre-cooked meals (11)…….. in bags, which they warm up in a small oven. These are tastier than granules but, according to Dr. Helen Lane, a research nutritionist, it is difficult to get astronauts to eat as much as they need. It’s partly that they are so busy but also because there is no (12)………to eat.” So tickling their taste buds is an (13)……….struggle, especially since one of the effects of zero gravity is to  reduce the sense of smell.
            Weightlessness is an important (14)……….in space food because of the danger that the food might fragment and float off in different (15)……….. We need foods that coalesce,” says Dr. Lane. Yoghurts, puddings, sauces all hold together in large droplets. Your spoon may float away, but the food will stay on it.”
(11)
A.sealed
B.tied     
C.locked            
D.fixed

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.
FOOD FOR ASTRONAUTS
            It used to be thought that people could not swallow well in space, so the food (6)………for astronauts consisted of bite-sized pieces of food pushed out of tubes. But now it is known hthat you can eat in space in the same way as on Earth.
            The physical constraints lie in the body of the spaceship rather than the body of the astronaut. Limited storage and cooking facilities, with no space or power to (7)………for complex food preparation, mean that the (8)……… for space nutritionists has gone beyond providing astronauts with food that is palatable and good for them. The solution has emerged in the (9)………of dehydrated foods. Simply add water to the freeze-dried granules and ………bon appetit!
            With space flights often (10)…………..more than a week, astronauts cannot live on granules alone. They also take pre-cooked meals (11)…….. in bags, which they warm up in a small oven. These are tastier than granules but, according to Dr. Helen Lane, a research nutritionist, it is difficult to get astronauts to eat as much as they need. It’s partly that they are so busy but also because there is no (12)………to eat.” So tickling their taste buds is an (13)……….struggle, especially since one of the effects of zero gravity is to  reduce the sense of smell.
            Weightlessness is an important (14)……….in space food because of the danger that the food might fragment and float off in different (15)……….. We need foods that coalesce,” says Dr. Lane. Yoghurts, puddings, sauces all hold together in large droplets. Your spoon may float away, but the food will stay on it.”
(10)
A.enduring
B.lasting
C.flying
D.going

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.
FOOD FOR ASTRONAUTS
            It used to be thought that people could not swallow well in space, so the food (6)………for astronauts consisted of bite-sized pieces of food pushed out of tubes. But now it is known hthat you can eat in space in the same way as on Earth.
            The physical constraints lie in the body of the spaceship rather than the body of the astronaut. Limited storage and cooking facilities, with no space or power to (7)………for complex food preparation, mean that the (8)……… for space nutritionists has gone beyond providing astronauts with food that is palatable and good for them. The solution has emerged in the (9)………of dehydrated foods. Simply add water to the freeze-dried granules and ………bon appetit!
            With space flights often (10)…………..more than a week, astronauts cannot live on granules alone. They also take pre-cooked meals (11)…….. in bags, which they warm up in a small oven. These are tastier than granules but, according to Dr. Helen Lane, a research nutritionist, it is difficult to get astronauts to eat as much as they need. It’s partly that they are so busy but also because there is no (12)………to eat.” So tickling their taste buds is an (13)……….struggle, especially since one of the effects of zero gravity is to  reduce the sense of smell.
            Weightlessness is an important (14)……….in space food because of the danger that the food might fragment and float off in different (15)……….. We need foods that coalesce,” says Dr. Lane. Yoghurts, puddings, sauces all hold together in large droplets. Your spoon may float away, but the food will stay on it.”
(9)
A.form
B.way
C.type
D.order

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.
FOOD FOR ASTRONAUTS
            It used to be thought that people could not swallow well in space, so the food (6)………for astronauts consisted of bite-sized pieces of food pushed out of tubes. But now it is known hthat you can eat in space in the same way as on Earth.
            The physical constraints lie in the body of the spaceship rather than the body of the astronaut. Limited storage and cooking facilities, with no space or power to (7)………for complex food preparation, mean that the (8)……… for space nutritionists has gone beyond providing astronauts with food that is palatable and good for them. The solution has emerged in the (9)………of dehydrated foods. Simply add water to the freeze-dried granules and ………bon appetit!
            With space flights often (10)…………..more than a week, astronauts cannot live on granules alone. They also take pre-cooked meals (11)…….. in bags, which they warm up in a small oven. These are tastier than granules but, according to Dr. Helen Lane, a research nutritionist, it is difficult to get astronauts to eat as much as they need. It’s partly that they are so busy but also because there is no (12)………to eat.” So tickling their taste buds is an (13)……….struggle, especially since one of the effects of zero gravity is to  reduce the sense of smell.
            Weightlessness is an important (14)……….in space food because of the danger that the food might fragment and float off in different (15)……….. We need foods that coalesce,” says Dr. Lane. Yoghurts, puddings, sauces all hold together in large droplets. Your spoon may float away, but the food will stay on it.”
(8)
A.opportunity   
B.challenge       
C.achievement  
D.ambition

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.
FOOD FOR ASTRONAUTS
            It used to be thought that people could not swallow well in space, so the food (6)………for astronauts consisted of bite-sized pieces of food pushed out of tubes. But now it is known hthat you can eat in space in the same way as on Earth.
            The physical constraints lie in the body of the spaceship rather than the body of the astronaut. Limited storage and cooking facilities, with no space or power to (7)………for complex food preparation, mean that the (8)……… for space nutritionists has gone beyond providing astronauts with food that is palatable and good for them. The solution has emerged in the (9)………of dehydrated foods. Simply add water to the freeze-dried granules and ………bon appetit!
            With space flights often (10)…………..more than a week, astronauts cannot live on granules alone. They also take pre-cooked meals (11)…….. in bags, which they warm up in a small oven. These are tastier than granules but, according to Dr. Helen Lane, a research nutritionist, it is difficult to get astronauts to eat as much as they need. It’s partly that they are so busy but also because there is no (12)………to eat.” So tickling their taste buds is an (13)……….struggle, especially since one of the effects of zero gravity is to  reduce the sense of smell.
            Weightlessness is an important (14)……….in space food because of the danger that the food might fragment and float off in different (15)……….. We need foods that coalesce,” says Dr. Lane. Yoghurts, puddings, sauces all hold together in large droplets. Your spoon may float away, but the food will stay on it.”
(7)
A.provide          
B.give
C.spare
D.make

Read the following passage and circle A, B, C or D to indicate the correct answer to each of the question from 16 to 25
            George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products.
            The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials and warned of the growing need to develop substitutes for the natural substances being used up by humans.
            Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. As an authority on plant diseases – especially of the fungus variety – Carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.
With what topic is the passage mainly concerned?
A.The work and career of George Washington Carver
B.The research conducted at Tuskegee Institute
C.The progress of the science of synthetics.
D.The use of plants as a source of nutrition

Read the following passage and circle A, B, C or D to indicate the correct answer to each of the question from 16 to 25
            George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products.
            The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials and warned of the growing need to develop substitutes for the natural substances being used up by humans.
            Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. As an authority on plant diseases – especially of the fungus variety – Carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.
The word “step” in paragraph 1 could best be replaced with
A.footprint        
B.action
C.scale
D.stair

Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
       Atomic were once thought to be fundamental pieces of matter, but they are in turn made of smaller subatomic particles. There are three major subatomic particles neutrons, protons , and electronic. Protons and neutrons can be broken into even smaller units, but these smaller units do not occur naturally in nature and are though to only be produced in manmade particle accelerators and perhaps in extreme steller events like supernovas. The structure of an atom can best be described as a small solar system, with the neutrons at the center and the electrons circling them in various orbits , just as the planets circle the sun .In reality , the structure of an atom is far more complex, because the laws of physics are fundamentally different at the atomic level than of the level of the observable word. The true nature of atomic structure can only be expressed accurately through complex mathematical formulas .This explanation , however, is of little use to most average people.
           Protons and neutrons have nearly equal mass and size, but protons carry a positive electrical charge, while neutrons carry no charge at all. Protons and neutrons are bound together by the strong nuclear force, one of the four basic forces in the universe.Protons and neutrons give atoms some of their most basic properties.Elements are defined by two numbers their atomic number , which is equal to the number of protons they have, and their atomic weight , which is equal to total number  of their neutrons and protons.In most lighter atoms , the number of neutrons and protons is equal , and the element is stable.In heavier atoms, however , there are more neutrons than protons , and the element is unstable, eventually losing neutrons through radioactive decay until a neutral state is reached.
       Electrons are negatively charged particles.They are boundto their atoms through electromagnetic attraction . Opposite electrical charges attract one another, so the positive charge of the proton helps keep the negatively charged electron in orbit around the nucleus of the atom. Electrons are different from neutrons in that they can not be broken down into smaller particles. They are also far smaller and lighter than neutrons and protons. An electron is about one thousandth of the diameterof a proton and an even smaller fraction of its mass. Electrons circle the protons and neutrons at the center of the atom in orbit.These orbits are often called electron shells. The closer the orbit is to the center of the atom, the lower its energy is. There are seven electron shells, and each higher level can hold more electron than the previous shell. Electrons naturally seek to occupy the lowest shell possible .So if there is space in a lower shell, an electron will drop down to occupy that space. At temperatures higher than a few hundred degrees , electrons will gain energy and move to a higher shell, but only momentarily.When the electrons drop back down to their natural shell, they emit light .This is why fires and other very hot objects seem to glow.
Electrons are also primarily responsible for many of the chemical properties of atoms. Since electrons seek to occupy the lowest electron shell possible, they will move from one atom to another if there is a space available in a lower electron shell. For example, if there is an atom with an open space in its third shell, and it comes into contact with an atom with electrons in its fourth shell, the first atom will take one of these electrons to complete its third shell. When this happens, the two atoms will be chemically bonded to form a molecule. Furthermore, atoms sometimes lose electrons in collisions with other atoms. When it happens, the radio of protons and electrons in the atom changes, and therefore, the overall electrical charge of the atom changes as well. These atoms are called isotopes, and they have significantly different chemical properties from their parent atoms.
In paragraph 1, why does the author compare the structure of an atom to a solar system?
A.To provide an explanation of atomic structure that will be easily understood.
B.To show that the complex mathematical formulas used to explain atomic structure are inaccurate.
C.To show the influence of atomic structure on the world at the observable level.
D.To contrast the size of atoms with the size of objects at the observable level.