题目内容：

直接引语变间接引语的几个句子
1.I hear someone knocking at the door.
2.Could you say it again?
3.That's a good idea.
4.I can't play the violin,either.
5.What should I do?
6.Please read aloud.
7.Why do you wear a hat?
8.Chairman Mao died in 1976.
9.Would you like to join us?
10.Failure is the mother of success.
11.I find it's easy to learn math well.
12.Are you sure?
13.You'd better speak English in English class.
14.Who knows this?
主句随便啦，比如he said......之类的