中文谷—Wherearetheboys?—Oh，they basketballontheplaygro...
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问题详情：
—Where are the boys?
—Oh，they basketball on the playground just now．
A．were seen play B．were seen to play
C．have seen to play D．have seen play
【回答】
B
知识点：动词时态
题型：选择题
标签：
Wherearetheboys
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