1. 用所给单词的适当形式填空。

1. （1） If it   (not rain) tomorrow, we'll go to the zoo.

3. （2） People like (travel) in spring because it is neither too hot nor too cold.

5. （3） Daniel did the exercises too (care), and it made his teacher very angry.

7. （4） It is necessary for us (understand) the importance of health care.

9. （5） I (make) some friends on my trip to Beijing last year.