I forgot to ring up Mr.Wang yesterday,so I _______ today.(2 分)

题目

I forgot to ring up Mr.Wang yesterday,so I _______ today.(2 分)
A.can do it
B.must do it
C.had to do it
D.must have to do it

答案

B
A. can do it 语境不表示"能"
B. must do it 合乎语境表示"必须去做"
C. had to do it 时态问题,today——应用现在时
D. must have to do it 两个"必须"不能同时使用