A、Return his books to the library. B、Take a nap. C、Study for a test. D、Go swimming. D推断题。男士在最后一句中提到I’m going to drop my books of

M: I’m glad that’s over.
W: I know what you mean. History’s not like math—you always feel like you could have said a little bit more to answer the question.
M: So. how do you think what you did?
W: Pretty well. I was running out of things to say towards the end, when I was writing about the causes of the Great Depression.
M: Wait a minute. That was only the second question. You mean you didn’t even do Questions Three and Four.
W: Of course I did them. I just didn’t do them in that order. With essay tests, I always read through thewhole test before 1 begin. Then I answer the question I feel most confident about first. I knew the stuff for Question Three.
M: You mean the question on "presidential power"?
W: Right. I had prepared for that exact question, so I did it first.
M: Yeah, but why not save time for the hard stuff?
W: I look at it this way: if I can’t do everything, I’ll do what I know best. Plus, while I’m writing the easy questions, I often bring some things that help me with the hard ones to my mind.
M: You know, I did recall something in the middle of Question Four that I should have included in my first essay. But there wasn’t time to go back. I really wish I could redo that answer.
W: I’m sure you did fine anyhow. What are you going to do now?
M: I’m going to drop my books off at my room and then head for the pool. I need some exercise to help me unwind.
Questions:
19. What were the speakers doing just a moment before the conversation?
20. What does the man wish he could do?
21. What will the man probably do after the conversation?