-- There is a lot of smoke coming out of the teaching-building there.-Really? It b

发布时间：2020-08-17 14:39:13

---- There is a lot of smoke ing out of the teaching-building there.
---- Really? It      be a fire, most probably.
A. can
B. ought to
C. have to
D. must

网友回答

A. can
B. ought to
C. have to
(答案→)D. must
解析：从most probably.可以看出是很可能, must表示一定
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