小测验：选择正确的单词

1. His poor eyesight disabled him from doing it.
   他眼力不好使他不能做这件事。
2. I was in trouble for not doing my homework.
   我未做家庭作业而有麻烦了。
3. unsell sb.on the idea of doing sth.
   劝说某人放弃做某事
4. To be nervously irresolute in acting or doing.
   不知所措在表演或做事时处于紧张犹豫中
5. Doing is itself learning.
   干本身就是学习。

　1个名词解释