附：本练习答案
1、He told me that he had left his book in his room.
2、She said that he would be busy.
3、She asked Tom if /whether he could help her.
4、She asked me whether that book was mine or his.
5、The teacher asked me how I had repaired it.
6、The teacher told the students not to waste their time.
7、The mother asked Tom to get up early.
8、The teacher said that the earth goes round the sun.
9、My father said practice make perfect.
10、The boy told us he usually gets up at six every day.
11、He said they are still students.
12、He told me that he was born in1978.
13、The engineer said he was at college in 1967.
14、He said he had studied English since he was a boy.
15、She said she had read the book while she was waiting for a bus.
16、Mr. Green told them Joe had told him all about his story when he asked for a job.
17、He said they (had ) insisted that she start immediately.
18、She said he demanded that the girl leave at once.
19、I told him I had finished it.
20、She told us she would come here tomorrow.
21、The young man asked Karen where her chemistry teacher lived.
22、The little boy said happily that he had gained the first place in the mathematics competition.
23、The physics teacher told the boys and girls that light travels faster than sound.
24、Mary asked me if /whether I would go to the concert with her that evening.
25、The old man asked my brother what he had done there the day before.
