When we see well，we do not think about our eyes very often.It is only when we cannot see perfectly that we realize how important our eyes are.
People who are near-sighted can only see things that are very close to their eyes，Everything else seems blurry（=unclear）.Many people who do a lot of work，such as writing，reading and sewing become near—sighted.Then
People who are far-sighted suffer from just the opposite problem.They can see things that are far away，but they have difficulty in reading a book unless they hold it at arm's length.If they want to do much reading ，they must get glasses，too.
Other people do not see clearly because their eyes are not exactly the right shape.They have what is called astigmatism （散光）.This，too，can be corrected by glasses.Some people's eyes become cloudy because of cataracts （白內(nèi)障）.Long ago these people often became blind.Now，however，it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances.Each eye sees things from a slightly different angle （角度）.To prove this to yourself，look at an object our of one eye；then look at the same object out of your other eye.You will find the object's relation to the background and other things around it has changed.The difference between these two different eye views helps us to judge how far away an object is.People who have only one eye cannot judge distance as people with two eyes.
（1）We should take good care of our eyes CC. .
A.only when we can see well
B.only when we cannot see perfectly
C.even if we can see well
D.only when we realize how important our eyes are
（2）When things far away seem indistinct（模糊不清） ，one is probably AA. .
A.near-sighted
B.far-sighted
C.astigmatic
D.suffering from cataracts
（3）The underlined word suffer in the third paragraph probably means DD. .
A.experience
B.imagine
C.feel pain
D.are affected with
（4）Having two eyes instead of one is particularly useful for DD. .
A.seeing at night
B.seeing objects far away
C.looking over a wide area
D.judging distances
（5）People who suffer from astigmatism have BB.
A.one eye bigger than the other
B.eyes that are not exactly the right shape
C.a difficulty that can be corrected by an operation
D.an eye difficulty that cannot be corrected by glasses
【答案】C；A；D；D；B
【解答】
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發(fā)布：2024/5/15 8:0:8組卷：0引用：2難度：0.5
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1．Passage A
Many of us have read stories or seen films about space-creatures.They come to Earth in spaceships that look like flying saucer（飛碟）.These space-creatures do not look like human beings at all，but they are usually very intelligent（聰明）.In one film，they were tiny little men with large heads.When they landed on Earth，they knew exactly what to do.They went straight to the President's palace and made him their prisoner！
The stories about space-creatures are，of course，not true.Space-Creatures exist only in story-books and in films，just like giants（巨人） and fairies.
But many scientists are asking this question.Is there life on other planets？There are millions of planets in the Universe，and Earth is just one of them.Human beings have lived on Earth for thousands of years.Could there be living things on other planets too？Many people believe that the other planets in the Universe are not suitable for living things.They are either too hot or too cold.Some of them have poisonous gases on them that will kill any living thing.
Are scientists sure that there is no life on other planets？
At this stage（階段） we still cannot be sure.All the planets，except the Moon and Mars，are so far away that it will take hundreds of years for spaceships to reach them！
（1）The best title for this passage is "".
A.Scientific Wonders：Space-creatures
B.Is There Life on Other Planets
C.Are Scientists Sure
D.Stories about Space-creatures
（2）It is impossible for scientists to know about other planets in the Universe because.
A.all the planets，except the Moon，are so far away that it will take hundreds of years for our spaceships to reach them
B.all the planets are too far to reach
C.all the planets，except the Moon and Mars，are so far away that it will take hundreds of years for our spaceships to reach them.
D.All the planets are only too far to reach
（3）Which of the following statements is not true according to the passage？
A.The stories about space-creatures are true.
B.Space-creatures are in stories.
C.Space-creatures are in films.
D.Many scientists are asking if there is life on other planets.
（4）Which of the following statements is true according to the passage？
A.All the planets are either too hot or too cold.
B.Space-creatures are only in story –books and in films.
C.People love giants because they are true
D.Children love fairies because they are true.
（5）In the passage "straight" means.
A.upright
B.level
C.directly
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2．We each have a memory.That's （1）
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3．When our self-confidence is low，we sometimes tend to believe what others think of us.We do not have the confidence in ourselves（1）
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