问题补充:
- Tom, where is your father?
- I’m not sure. He in his office.
A. must be
B. may be
C. maybe
D. need be
答案:
A. must be
(答案→)B. may be
C. maybe
D. need be
解析:句意:汤姆,你爸爸在哪?我不确定,他可能在办公室。A 一定是,表示肯定的推测;B 可能是;C 可能;D 必要的话;结合语境,是不太确定的推测,故选B。
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