—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
本題考查情態(tài)動(dòng)詞。句意：--街道中間為何聚集了這么多人？--我不知道，也許發(fā)生了交通事故。might也許；可能。表示不肯定的猜測。
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