单项选择题

W: It was exactly two years ago today that we moved to this town. You started working on your degree, and I started working down at the lab.
M: It seems like only yesterday. I suppose that I’m so busy that I don’t even know how the time passes.
W: I’d expect the opposite. I mean the way you’ve been studying, working on experiments, and writing quotations. It might seem more like four years than two.
M: Haven’t you ever noticed how time seems to crawl when you have nothing to do But how time flies when you are busy with what you really like to do
W: That’s true. Those days when there’s not much to do at the lab don’t ever seem to end.
M: Just wait a little longer. As soon as I finish my degree we’ll open our own laboratory, Morrison and Morrison Biochemical Analysis.

What does the man say about the passage of time()

A. It always goes too fast.
C. It seems slower when one has too much to do.
B. It always goes too slowly.
D. It seems slower when one has little to do.