单词拼写。

1. We learn to be good ______ . (学生)

2. We should ______ (保持) the water ______ (干净).

3. We shouldn't make the water ______ (脏的).

4. We should ______(使用) things made of ______(纸).

5. People are ______(尽力) protect them .

6. Deer can run very ______(快).

7. I learned a lot from our ______(课本).

8. I learned a lot from TV programmes , ______(收音机) and newspapers .