【答案解析】[听力原文] 14-16 W: Bye for now. M: Bye.But where are you going? W: The bank.the supermarket and… M: Will you buy an exercise book for me? W: I guess so.But I'll go to the post office first before I go to the supermarket. M: Can you also buy me a pen? The one you gave me last week doesn't work now. W: How come? M: It fell off the desk and was broken. W: Can you be more careful with your things? M: Ok.Oh.Can you wait a second? W: What for? M: You are going to the post office, right? W: Yes.so what? M: Here's a letter for Sam.Can you post it?