题目内容

—Why are those people gathering in the middle of the street?
—I don’t know. There ________ be an accident.
A．shallB．shouldC．canD．might
D
本题考查情态动词。句意：--街道中间为何聚集了这么多人？--我不知道，也许发生了交通事故。might也许；可能。表示不肯定的猜测。
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