Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer in each of the following questions.
I was about to leave when something occurred which attracted my ______.




A.thought
B.surprise
C.attention
D.sympathy

I. Phần trắc nghiệm
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Scientists have proposed a possible……………to the problem of global warming.




A.solution
B.plan
C.result
D.effect

(28)




A.on
B.from
C.at
D.in

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 from 26 to 35.
A radio telescope is a radio receiver that "sees" radio waves. Unlike a normal telescope, which sees light, a radio telescope is used primarily in the are a of astronomy because it can detect radio waves that are emitted by celestial objects. Such objects in space, also called radio objects, can be things such as hot gas, electrons, and wavelengths given off by different atoms and molecules.
The first radio telescope was invented by Grote Reber in 1937. He was an American who graduated with a degree in engineering. He went on to work as an amateur radio operator and later decided to try to build his own radio telescope in his backyard. Reber's first two radio receivers failed to pick up any signals from outer space, but in 1938, his third radio telescope successfully picked up radio waves from A radio telescope consists of a large parabolic-shaped dish antenna or a combination of two or more. The significance of the parabolic shape allows for the incoming radio waves to be concentrated on one focal point, allowing the signals to be picked up as strongly as possible. A larger dish means that more signals can be received and focalized.
In the late 1950s and early 1960s, the largest radio telescope of the time was invented with a seventy-six meter telescope although larger telescopes have been made since then. The largest current radio telescope in the world is the RATAN-600 in Russia, whose diameter is 576 meters. It has provided valuable feedback of the sun's radio wavelengths and atmosphere. The largest radio telescope in Europe is a 100-meter diameter telescope in Germany, and the largest radio telescope in the United States is the Big Ear in the state of Ohio. The largest array of telescopes is the Giant Metrewave Radio Telescope in India.
Radio telescopes have provided scientists with valuable information about our universe. One of the most important functions of radio telescopes is their ability to allow scientists to track different space probes, the unmanned space missions in outer space. Radio telescopes allow for the travel of space probes into places like the surface of Mars that are too dangerous for men to explore. With out radio wave technology, scientists would not know much of what inhabits the universe nor would they be able to see it. Radio waves are our eyes and ears in outer space.
Originally, this passage was probably published in ______.




A.a fashion magazine
B.a scientific journal
C.a business journal
D.a book on environment

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
While I was looking through my old albums the other day, I ______ this photograph of my parents' wedding.




A.took after
B.made up
C.turned down
D.came across

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Phuong Thao is a student in Ms Lan’s writing class. She is asking for Ms Lan’s comments on her last essay. Select the most suitable response to fill in the blank. Phuong Thao : “You must have found reading my essay very tiring.” Ms Lan: “______. I enjoyed it.”




A.Not in the least
B.Just in case
C.At all costs
D.You are welcome

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
“My secretary will book you an afternoon flight and have you ______ at the airport.”




A.picked up
B.picking up
C.pick up
D.to pick up

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The carefully nurtured gardens with a wide ______ of flowers and fruit trees have added elegance to this place and made it a major tourist attraction.




A.variety
B.amount
C.species
D.number

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to the sentence given in each of the following questions.
It was only when I left home that I realized how much my family meant to me.




A.Not until I left home did I realize how much my family meant to me.
B.I left home and didn’t realize how meaningful my family was.
C.Before I left home, I realized how much my family meant to me.
D.As soon as I left home, I found out what a family could do without.

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 from 51 to 60.
The ability to conduct electricity is one of the key properties of a metal. Other solid materials such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how their atoms bond together. In order to bond together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms with a positive charge and they are now strictly ions. The lost electrons are free to move in what is known as a sea of electrons. Since the electrons are negatively charged they attract the ions and this is what keeps the structure together.
An electric current is a flow of charge and since the electrons in the sea of electrons are free to move they can be made to flow in one direction when a source of electrical energy such as a battery is connected to the metal. Hence we have an electric current flowing through the wire, and this is what makes metals such good conductors of electricity. The only other common solid conducting material that pencil users are likely to encounter is graphite (what the ‘lead’ of a pencil is made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic substance like salt we can make the electrically charged ions flow to create a current but only when those ions are free to move, either when the substance is a liquid or dissolved in water. In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow.
Electrical insulators are substances that cannot conduct electricity well either, because they contain no charged particles or any charged particles they might contain do not flow easily. Water itself is a poor conductor of electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral). However, most water we encounter does contain dissolved charged particles, so it will be more conductive than pure water. Many of the problems that occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin through perspiration and it dissolves in the water to make it more conductive
The word “they” in paragraph 3 refers to ______.




A.charged particles
B.electrical insulators
C.electric currents
D.charged ions