问题补充:
Today is Wednesday. He be at home. He be at school.
A. can’t, can
B. can’t, must
C. mustn’t, must
D. mustn’t, can
答案:
A. can’t, can
(答案→)B. can’t, must
C. mustn’t, must
D. mustn’t, can
解析:本题的含义是今天是星期三,是上学的时间,所以他在家的可能性应该是最小,故用can’t(不可能),在学校上学的可能性最大,故用must(一定),故本题选B.