They are waiting_____a bus stop.They are waiting _____ a bus stop.A.at B.for C.in D.on
问题描述：
They are waiting_____a bus stop.
They are waiting _____ a bus stop.
A.at B.for C.in D.on
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They are waiting_____a bus stop.They are waiting _____ a bus stop.A.at B.for C.in D.on