281.
W: You don't look happy. What's up?
M: It's the computer assignment. John and I teamed up to do the project together. But so far we've done only half it.
W: Well, you'd better hurry up.
M: I know. But actually, John is not doing anything. I don't know how to say it to him. He's having problems with his parents and has been quite upset these days.
W: But it's supposed to be his work as much as yours. I suggest you talk to him. And let him know that he should share the work.
M: Yes. I think I'll share the work.

答案解析：
(1) 正确答案为C。根据John is not doing anything. I don't know how to say it to him.约翰什么都不做，我不知道要怎么跟他说。可知，二人在谈论如何让约翰参与作业，因此C项正确。
(2) 正确答案为A。根据He's having problems with his parents and has been quite upset these days.他和他父母之间出现了问题，他这些天都很沮丧。可知，约翰沮丧的原因是因为与父母闹了矛盾，因此A项正确。