It's dark, Mum be waiting for my return.A. canB. shouldC. mustD. may

发布时间:2020-08-15 01:20:31

It's dark, Mum      be waiting for my return.
A. can
B. should
C. must
D. may

网友回答

A. can
B. should
(答案→)C. must
D. may
解析:must表示一种推测,意为:想必, 一定.只能用于肯定句中.  
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