A、He drank too much coffee last night. B、He caught a cold last night. C、He is nervous about his project. D、He missed dinner last

W: So you are up to some tennis this afternoon or what?
M: Well, to tell you the truth, I’m not feeling so hot today.
W: Come on. How long has it been since we played?
M: A couple of days.
W: A couple of days? Come on. It’s been more than a couple of days.
M: Yeah. I guess you’re right. It’s been almost a week.
W: It’s been exactly a week. And we used to play at least three times this week.
M: I know. Playing right after class was something to look forward to.
W: Yeah. And it was right before dinner. So we built up our appetite.
M: I’ve just been very busy. I guess. And my stomach is bothering me today.
W: But you look OK to me.
M: Well, I was up late with Steve in the library working on a project. We got to do it by tomorrow. We’ve been working on it all weekend. And I was drinking a lot of coffee. I guess, I just drank too much.
W: Listen. I took that class last semester. And I could meet you in the library later tonight and help you with it if you want. And then you have time to play tennis this afternoon.
M: Yeah. I guess my stomach doesn’t hurt that bad. And I could certainly use your help. But it’s also...
W: Is there something else bothering you?
M: Well, to be honest, I’m getting tired.
W: OK, don’t worry. You may take some time to rest. We will meet for tennis some time later.