With the change of red lights, there are long queues of vehicles that wait while a few people who walk across the zebra.

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问题 With the change of red lights, there are long queues of vehicles that wait while a few people who walk across the zebra.

选项 A、wait... walk
B、waiting... walking
C、waiting... walk
D、wait... walking

答案B

解析 结构应用本句是there+ be+ 名词词组(+修饰语)结构;其中的名词词组是两个并列的名词词组:long queues of vehicles和a few people,用并列连词while连接;因此并列连词连接的成分应结构相同,语法功能一致,因划线部分都是前面名词的修饰成分,相当于一个形容词从句,因表示主动,正在进行,因此应用动词-ing形式;所以B为答案。
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