1．A __frightened__(frighten) hedgehog(刺猬) contracts its body into a ball.
2．The workers are doing all they can to cut __down__ the accident rate.
3．The young dancers looked so charming in their beautiful clothes that we took __masses__(mass) of pictures of them.
4．__Caught__(catch) in dealing with such a film, you will be sorry.
5．He appeared __to_be_reading__(read) when I entered the room.
6．It is __such__ fine weather that we all want to go out for a walk.
7．He makes it a rule __to_read__(read) aloud and recite ten English words every morning.
8．I find it no use __talking__(talk) to a person like him about it.
9．The work was __so__ difficult that he could not finish it on time.
10．As a student in Senior Three, I must work hard. Meanwhile, I should take exercise to __strengthen__(strong) my body.
