---There’s someone knocking on the door. Who it be?---It must be John. He promised to be

发布时间:2020-08-17 06:04:50

---There’s someone knocking on the door. Who      it be?
---It must be John. He promised to be here at 8:00.
A. must
B. can
C. need
D. shall

网友回答

A. must
(答案→)B. can
C. need
D. shall
解析:
试题分析:考查情态动词用法。A必须;B能够,可能;C 需要;D将会。从句意可知此处表示推测,而must表推测时只用于肯定句,C、D选项意思不恰当,can表推测可以用于否定句和疑问句表示“可能”,所以B选项正确。句意:--有人在敲门。可能会是谁呢?--肯定是约翰。他答应八点钟来这儿了。
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