Ⅰ.单句语法填空
1．Being caught(catch) in a heavy traffic jam is quite an unpleasant experience.
2．—What a frightening scene on the stage!
—Yeah，we girls were really frightened．(frighten)
3．The young dancers looked so charming in their beautiful clothes that we took masses (mass) of pictures of them.
4．The teacher caught him sleeping (sleep) in class，which made his parents angry.
5．He appeared to be reading (read) an English book when I entered the room.
6．As a result of the sandstorm，there were fewer people on the road and the traffic moved slowly.
7．It is such fine weather that we all want to go out for a walk.
8．I find it no use talking (talk) to a person like him about it because he doesn't care about it.
9．As a student in Senior School，I must work hard.Meanwhile，I should take exercise to strengthen (strength) my body.
10．We should prevent young trees being cut (cut) down.
