1. 根据首字母提示补全单词。

1. （1） Puppy love（早恋）among the students is not only a school problem but also a s problem.

3. （2） Chinese g is trying to save this kind of special language. It is dying.

5. （3） Many Chinese families couldn't o their children a good education in the past.

7. （4） The condition of the patient is getting much w than before.

9. （5） Many countries have taken measures to protect their environment. The n environments are changing for the better.