题目列表(包括答案和解析)
John waited at the bus stop for nearly an hour ___ the bus finally arrived．
A．when B．as C．before D．while
John waited at the bus stop for nearly an hour ________ the bus finally arrived．
when
as
before
while
John waited at the bus-stop for nearly half an hour the bus finally arrived .
A．when B．as C．before D．while
John waited at the bus-stop for nearly half an hour the bus finally arrived .
A．when B．as C．before D．while
John waited at the bus-stop for nearly half an hour the bus finally arrived .
A．when B．as C．before D．while
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