Even the top students in our class can't work out this problem, so it be very difficult.A. may B. must C. can D. need B [解析]句意:甚至我班里最好的学生都做不出来这个题.因此它一定很难.A. may也许,B. must 一定,表示推测时一般用于肯定句中.语气题目和参考答案——青夏教育精英家教网—

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Even the top students in our class can't work out this problem, so it be very difficult.

A. may B. must C. can D. need

B 【解析】句意：甚至我班里最好的学生都做不出来这个题，因此它一定很难。A. may也许；B. must 一定；表示推测时一般用于肯定句中，语气较肯定，较有把握； C. can可能，表示推测时，往往用于否定句或疑问句；D. need需要。根据Even the top students in our class can't work out this problem最好的学生做不出来的题，应该...

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