单项选择题

[听力原文]8-10
W: What are you doing, Bill Writing a letter
M: Yes, and it’s not easy.
W: My Aunt Mabel sent me a gift for my birthday. I can’t remember which gift was hers, but I want to thank her for it.
M: Oh, that’s a difficult problem. When it happens to me, I just write to say" Thank you for the wonderful girl" without saying what a gift was. Are you with me
W: Yes, thanks. That’s a clever idea.
M: When you have a bad memory, you have to be clever.

What do you think of Bill()

A.He is foolish.
B.He has a bad memory.
C.He has a good memory.
D.He is helpful.