问题详情：
用括号内所给单词的适当形式填空。
1. Forests can help prevent water from ________(run) away，so drought doesn't often happen in this area.
2. There are many ________(wolf) in the zoo.
3. Scientists didn't find anything ________(value) in this area last year.
4. Mike can't find his watch. It can ________(steal).
5. The boy is so ________(sleep) that he falls asleep during the class.
【回答】
ing es able stolen py
知识点：构词法
题型：完成句子
