1. 根据句意，从方框中选择恰当的单词填空，有的需要变换形式。

member；nervous，perhaps，old，explain

1. （1） Li Hui and hisbrother study in the same school
3. （2）  I'll go to Japan on holiday this summer, but I'm not sure．
5. （3） How manyare there in the music club?
   
7. （4） Mr. Smithhis decision to his family yesterday．
9. （5） Jenny felt quitewhen the teacher asked her to answer the question．