问题详情：
根据句意及汉语提示完成单词
1. We should take an active part in _______（保护）the environment.
2. Which animals are in _______（危险）? Do you know, Mike?
3. They are doing a lot of _______（研究）to protect animals.
4. We hate war and love the _______（和平）.
5. His English teacher looks kind of _______（瘦的）.
【回答】
1. protecting take part in后接动词-ing形式。
2. danger 介词in后用名词形式。
3. research 4. peace 5. thin
知识点：单词拼写
题型：单词拼写
