Even the top students in our class can't
题型:选择题
问题:
Even the top students in our class can't work out this problem. So it _____ be very difficult. [ ]
A. need
B. may
C. can
D. must
Even the top students in our class can't work out this problem. So it _____ be very difficult. [ ]
A. need
B. may
C. can
D. must