Every time the lights change to red, there are long queues of vehicles ______ while a few people ______across the road.

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问题 Every time the lights change to red, there are long queues of vehicles ______ while a few people ______across the road.

选项 A、wait; walk
B、waiting; walking
C、waiting; walk
D、waited; to be walking

答案B

解析 本题考查there be…doing的用法。there be…doing表示正在进行的动作,因此,第一个空格处应填入waiting。while连着两个并列部分,结构相同,故第二个空格处应填入walking,故答案为[B]项。
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