单项选择题
M: I was sorry to hear about Hill’s being fired. I know he was sick a lot and usually got to work late.
W: Oh it wasn’t that. Hill made a big mistake in last month’s accounting, and his boss was very angry.
A. He got angry with his boss.
B. He always got to work late.
C. He was frequently sick and absent from work.
D. He made a mistake in the accounting.