[简答题]It is only when we cannot see perfectly that we realize how important our eyes are. (Passage 1)

[简答题]It is only when we cannot see perfectly that we realize how important our eyes are.

[填空题]We modern people eat not only when we are hungry but also when we are in bad mood.

[填空题]We modem people eat not only when we are hungry but also when we are in bad mood.

[单项选择]Only when we give full play to man’s initiative can we make full use of machines to transform nature.（）
A. 只有扮演好自己角色的时候，我们才能改良机器，征服大自然。
B. 只有充分发挥人的主观能动性，才能充分利用机器改造大自然。
C. 只有充分发挥人的积极性的时候才能充分利用机器去征服自然。
D. 只有充分重视人才，我们才能最大限度地利用机器改变大自然。
E. 只有竭尽全力，我们才能真正做到物尽其用，彻底征服大自然。

[填空题]Only when we have got sufficient information, ____________________ (我们才能做出正确的判断).

[单项选择]It is only when you see that with your own eyes ______ fully understand how much he loves you.
A. can you
B. you can
C. that you can
D. that can you

[填空题]People see him when they’re ill

[单项选择]Only when we had finished all the work（）that it was too late to take a bus home.
A. did we realize
B. will we realize
C. we did realize
D. we will realize

[单项选择]Only when we came back home,（　）that my watch was missing.
A. did I find             
B. I found
C. I had found             
D. Had I found

[单项选择]Only when we had finished all the work ______ that it was too late to take a bus home.
A. did we realize
B. will we realize
C. we did realize
D. we will realize

[单项选择]

When we see well, we do not think about our eyes very often. (76) 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.
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, lf 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 ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.
A. near-sighted
B. far-sighted
C. astigmatic
D. suffering from cataracts