选择恰当的句子补全对话，将编号写在横线上。

A. Peter was ill. B. I came in quietly. C. But you should come back early. D. Can I go there again tonight? E. Maybe it was about ten o clock.

A: What time did you come home last night, Tom?

B: Oh, I don't know.

A: I didn't hear you back at that time.

B: Well. I didn't want to wake you up, Mum.

A: Did you play computer games outside?

B: No, Mum.  So I went to his home and helped him with his lessons.

A: You are a good boy.

B: Peter really needs my help.

A: All right.

B: OK, Mum.