题目内容：

用所给单词的适当形式填空。

1.Are these clothes their _____________ (wife)?

2.People in the _______________ (south) part of China like eating noodles.

3.Now there are a number of               (factory) in our hometown.

4.The air____________ (pollute)is more and more serious．

5.Look at these children ,they are playing _____________ (happy) in the park .