填空题。
1. We must be careful
____ fire.
2. Fire can burn down a lot
____ trees. (填上合适的介词)
3. We mustn’t smoke
____ the forest. (用合适的介词填空)
4. inside的反义词是
______ 。
5. thin的反义词是
______ .
6. match的复数形式是
______ .
7. We mustn’t
______ .

8. Fire gives us
______ (热) and light.