参考答案

1）He asked the policeman，“What happened to you?”
/ He asked the policeman，“What happened to me?”
代词与先行词不一致

2）Not only did he make a promise, but he kept.
连词使用不当（not only前置一定要用倒装句）

3）All are ready, aren't they?
代词不一致

4）Listening to the wind and smelling the fragrant of the lily, you will found that the summer is coming.结构不平行

5）I accept his advice because I know he is keen in marketing.
语态不一致