One day, a boy found the cocoon(茧) of a butterfly and brought it home. A few days later, the boy saw a small ___16___in the cocoon. He sat and watched for several hours as a butterfly struggled to make ___17___body through that little hole. Suddenly it stopped.
So the boy ___18___to help the butterfly, thinking the butterfly might be ___19___. He took a pair of scissors(剪刀) and cut the hole ___20___. The butterfly came out of the cocoon, but it ___21___a little different. It had a weak body and small, thin ___22___. The butterfly didn’t start to fly. In fact, the butterfly spent the rest of its life crawling(爬行) around with a weak body and thin wings. It was never able to fly.
The boy acted with___23___but he didn’t understand why it could be like this. When a butterfly crawl out of the cocoon, it must struggle. The hard work of ___24___out of the cocoon makes the fluid(液体) from the butterfly’s body into its wings. It helps the butterfly be ___25___to fly. If the butterfly never has to squeeze(挤压) itself out of the cocoon, its wings will never get the fluid and it can never fly.
___26___struggles are what we need in our lives. If we lived our lives without any problems, we would never learn or grow. We would not be ___27___ we could have been and we would never fly.
In our lives, pain and suffering is the key to all windows, and sometimes even ___28___ growth, without it, there’s no way of life. We can’t avoid ___29___ or problems. So, next time you are ___30___ a problem or difficulty, remember the butterfly. Struggle a little–then fly!

A．hole B．worm C．tail D．snake

A．it B．it’s C．itself D．its

A．decided B．asked C．showed D．ordered

A．afraid B．interested C．surprised D．grateful

A．slimmer B．bigger C．shorter D．smaller

A．touched B．sounded C．looked D．smelt

A．wings B．feet C．eyes D．head

A．success B．excitement C．kindness D．humour

A．get B．getting C．to get D．got

A．ready B．quiet C．glad D．used

A．Somewhere B．Something C．Some time D．Sometimes

A．as helpful as B．as weak as C．as strong as D．as creative as

A．repeats B．recommends C．requires D．represents

A．happiness B．difficulties C．pleasure D．hope

A．served with B．growing into C．bringing in D．faced with