Everyone passed the exam.It difficult.A. can’t have beenB. must have beenC. couldn’t beD

发布时间：2020-08-16 12:40:26

Everyone passed the exam.It      difficult.
A. can’t have been
B. must have been
C. couldn’t be
D. might have been

网友回答

(答案→)A. can’t have been
B. must have been
C. couldn’t be
D. might have been
解析：可联系答.案.网客服索取。
以上问题属网友观点，不代表本站立场，仅供参考！