题目内容

—I wonder why Mr Green hasn't showed up at the meeting yet.
—I'm not sure，but he________in a traffic jam driving here.
A．could be stuckB．might have been stuck
C．might be stuckD．must have been stuck
B

试题分析：句意：——我想知道为什么格林先生还没有出现在会议上。——我不确定,但是他可能开车来这里的路上遇到了交通堵塞。根据hasn't showed up可知格林先生现在还没有出现，那他遇到交通堵塞应在现在之前，过去的时刻，情态动词+have+done表示过去，因此排除AC。must 表示又把我的推测“一定”，might表示没有把我的推测，“也许，可能”，根据 I'm not sure我不确定，选B。
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