[单项选择](There )was (too) much dust that we (couldn’t) see (what) was happening.
A. There
B. too
C. couldn’t
D. what

[单项选择]From the context, we can see that a lever is a tool which can be used to ______ .
A. remove the wheel from the bike
B. replace the wheel on the bike
C. push the tyre back into position
D. take out the inner tube

[单项选择]If we learn to see what we have to offer one another, then we can ______ our misunderstandings and work towards peace.
A. set out
B. set aside
C. set off
D. set down

[单项选择]There was so much noise that the speaker couldn't make himself ______.
A. hearing
B. to hear
C. heard
D. being heard

[单项选择]

Passage Two
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 is not so clear. Many people who do a lot of close work, such as writing, reading and sewing, become near sighted. Then they have to wear glasses in order to see distant (远处的) things clearly.
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 (白内障). Long ag
A. near-sighted
B. far-sighted
C. astigmatic
D. suffering from cataracts

[单项选择]We see lightening (before we hear) the thunder it (causes) because sound travels (more slowly) than (light is).
A. before we hear
B. causes
C. more slowly
D. light is

[单项选择]I couldn't hear anything because there was （）much noise.
A. so
B. such
C. enough

[单项选择]the population is too large, we have to take measures to control the birth rate.
A. Although
B. Since
C. If
D. Until

[单项选择]We see lightning (before we) hear the thunder (because) sound travels (more slowly) than (light is).
A. before we
B. because
C. more slowly
D. light is

[单项选择]We see lighting (before we hear) the thunder (because) sound travels (more slowly) than (light is).
A. before we hear
B. because
C. more slowly
D. light is

[单项选择]What three primary colors do we see


A. Red, white, and blue.
B. Red, green, and yellow.
C. Red, green, violet.
D. Red, green, blu