Beforethefirstclasseverymorningwe

发布时间：2020-07-26 09:12:23

Before the first class every morning we stand________line on the playground，and Wang Hai is________ the head of the line．A.at，atB.on，inC.in，atD.at，in

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C解析分析：stand in line(排成队)；at the head of…(在……的最前头)
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