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 .