You know he is not going to let us leave early if we get the work done. A. can’tB. may n

问题补充：

You know he is not going to let us leave early if we get the work done.

A. can’t

B. may not

C. shouldn’t

D. mustn’t

答案：

(答案→)A. can’t

B. may not

C. shouldn’t

D. mustn’t

解析：can’t在此为基本用法，指能力，其意为“不能”。