Read the passage carefully, then choose the best answer for each question.
SEEING THE IMPOSSIBLE
Can you believe everything you see? Not always! Sometimes our minds and our eyes make mistakes. At other times, our eyes and minds can become confused. This may be because we are looking at something called an optical illusion.
The word optical means "related to sight"—the way we see things with our eyes. An illusion is something that looks different from the way it really is. In short, an optical illusion is a kind of trick that our eyes play on us.
Look at these optical illusions and compare what you see with what your classmates see. The way we see things is often personal, so you may not see things the same way as someone else.
So can you trust your eyes? Perhaps the answer is “sometimes." Sometimes our eyes see something, and our minds understand it easily. At other times, we may need to look twice.
Which red dot is larger?
Most people say it’s the dot on the left. Now measure the dots. The red dot on the left may seem larger because of the blue dots around it, but they’re really the same size.
Look at this picture. What do you see?
Do you see a cup, or do you see two faces? Now look again! The illusion shows two different images at the same time. Therefore, our minds have to choose which image to look at. Scientists think this choice is difficult, because different parts of your brain are getting different information. One part "sees" the cup and another part "sees" the faces, so the image keeps changing.
Are the circles moving?
When you stare at this picture, your mind may tell you that the circles are moving, but this is impossible! How can a picture move? Some people think the circles seem to move because, often, when we see circle-in-circle shapes, like in car wheels or snake bodies, they are usually moving. Our brains are used to seeing these shapes move. So when our eyes see this shape, our mind infers that the image is moving. Other scientists believe the illusion of movement is caused by the tiny movements of our eyes as we look at the different colors and patterns of the picture.
What causes optical illusion 1?
A.The red dots aren’t close to each other.
B.We can see the blue dots clearly, but not the red dots.
C.We compare each red dot with the blue dots around it.
D.We can see that the blue dots are larger than the red ones.

They laughed a lot last night. The film _____have been very funny.
A.can
B.would
C.ought
D.must

My father___________when he found out that I had damaged his car.
A.hit the roof  
B.saw pink elephants  
C. brought the house down
D. made my blood boil.

If you don't hurry, the train __________ without you.
A.will leave 
B.will left 
C. leaves    
D. has left

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes each of the following exchanges.
 
Anne: “ Fancy a bite to eat?”    - Barbara: “_____”
A.No thanks, I’ve just had some.                           
B.No thanks, I’ve just had something.
C. No thanks, I’m not neatly very  thirsty.          
D.No thanks, I’m trying to give up.

_______(47)
A.in       
B.for 
C.to   
D.of

Is New York the largest city in the world?
A.
B.
C.
D.

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 questions
Humans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds – any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede farming. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants.
The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them.
In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world’s weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms.
The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season.
Which of the following best describes the organization of the passage?
A.Two possible causes of a phenomenon are compared.
B.A problem is described and possible solutions are discussed.
C.A general idea is introduced and several specific examples are given.
D.A recommendation is analysed and rejected

__________ (46)
A.Did     
B.Have    
C.Were     
D.Are

The new manager explained to the staff that she hoped to ................................new procedures to save time and money.
A.manufacture
B.establish
C.control
D.restore