题目内容：

1根据所给英文写出单词的合适形式。

1.Lily is a good         (swim) because she is the first in the swimming match.

2.We usually brush our teeth           (two) a day .

3.I have a little dog .            (it) nose is white.

4.How long do you spend             (chat) with your e-friends on the Internet every day?

5.Fruit and vegetables are             (health) food.