1．食物变质了。

　　　 The food has　　　 　　　　　．

5．“Who is the headmaster in this school?”she asked．(改为间接引语)

　　　 She asked who the headmaster in this school　　　 ．

4．You’d better go to the office now．(改为否定句)

　　　 You’d better　　　 　　　　to the office now．

3．He asked，“Did the murderer use a gun?”(改为间接引语)

　　 　He asked　　　 the murderer　　　 　　　　a gun?

2．He has found something unusual already．(改为否定句)

　　　 He　　　 found　　　 unusual yet．

1．She was at home alone last night．(同义句转换)

　　　 She was at home　　　 　　　　last night．

10．The man insisted that two　　　　 (thief)killed his wife．

9．My cousin saw a man　　 　(run)down the street last night．

8．After a long way，she was tired and　　　 (sleep)．

7．How　　　 (tidy)your bedroom is !Clean it at once．