—— May I leave the office before 5 o’clock in the afternoon?
—— No, I’m afraid you＿＿＿＿＿＿＿.
A. needn’t
B. shouldn’t
C. mustn't
D. won’t
网友回答
A. needn’t
B. shouldn’t
(答案→)C. mustn't
D. won’t
解析：may表示“允许”。回答may引起的问句，肯定式一般用 Yes, of course.／Yes, certainly.／Sure.／Yes, you may.否定式用No, you mustn’t.