题目内容：

请阅读下面短文， 理解其大意， 然后从每小题所给的 A、 B、 C 三个选项中，选出一个能填入空白处的最佳选项， 并在答题卡上将该项涂黑。

One day, while walking through the woods, a nice old man found a cocoon (茧) of a butterfly.

He took it home.

A few days later, a small opening ______. He sat and watched the butterfly for several hours as it struggled to ______ its body through that little hole.

Then it seemed to stop making any progress. It appeared that it could go no ______.

Then the man decided to help the butterfly, so he took a pair of scissors and ______ the remaining bit of the cocoon.

The butterfly then got out of the cocoon easily.

But it had a swollen (肿胀) body and small, shriveled (皱的) wings. The man continued to watch the butterfly because he expected it ______ enlarge its wings and reduce its body. ______happened! In fact, it was never able to fly.

In the man’s kindness, he did not understand that the butterfly required the struggles to get ______ the tiny opening. It would be ready for fight if it can force fluid (液体) from the body into its wings. Only in that way did it achieve its ______ from the small cocoon finally.

Sometimes difficulties are ______ what we need in our life. ______ life is always a bed of roses, it would make us weak. We would not be as strong as what we could have been. And we could never fly.

1.A.produced B.fell C.appeared

2.A.complete B.force C.spread

3.A.faster B.better C.farther

4.A.cut off B.took off C.put off

5.A.should B.would C.might

6.A.Either B.None C.Neither

7.A.into B.through C.against

8.A.ability B.energy C.freedom

9.A.hardly B.exactly C.clearly

10.A.If B.When C.Though