从方框中选出适合的句子补全对话，将答案序号写在题下方的横线上。

A. I hope everything goes well. B. What should I do? C. You should go to the Lost and Found to have a look. D. What’s the matter? E. Oh, there is something wrong with my bike.

A: Hi! Mike! You look unhappy.  
B:  
A: Your bike? Is your bike broken again?
B: No. This time I lost the key to the bike. ___________
A: ____________ Maybe it is there.
B: Thank you. I’ll go there now.
A: Oh, Mike, I think you should be careful with your things from now on.
B: OK, I will.
A: ___________
B: Thank you very much.