1 Even the top students in our class didn’t work out the problem . So it be very difficult . A. need B. must C. can’t D. shouldn’t
问题描述：
1 Even the top students in our class didn’t work out the problem . So it be very difficult .
A. need B. must C. can’t D. shouldn’t
答
B
这道题一定很难,连班里的尖子生也没能做出来.