根据句意，用括号内所给单词的适当形式填空。

1.  Which city has ____________ ( little ) air pollution, Wuxi or Nanjing?

2.  Next Sunday will be my brother’s __________ ( nine ) birthday.

3.  The boy is talented and ______________ ( energy ), so we all like him.

4.  Last Saturday evening Helen ran into a friend of __________ ( she ) at the shopping centre.

5.  Could you tell me how many ____________ ( shelf ) there are in your school library?

根据句意，用括号内所给单词的适当形式填空。
【小题1】His father looked______ (angry)at his son. Because he often makes mistakes.
【小题2】Next Sunday will be my brother’s __________  ( nine ) birthday.
【小题3】The children are very happy. They can’t hide their_________(excite)
【小题4】_______ (luck), he found his lost pen just now.
【小题5】The swallow flies to_________ (north) countries in summer every year.
【小题6】Some people think learning English is________ (use).That’s wrong.