摘要： John waited at the bus stop for nearly an hour the bus finally arrived. A. when B. as C. before D. while
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John waited at the bus stop for nearly an hour _____ the bus finally arrived.
[ ]
A. when
B. as
C. before
D. while
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B. as
C. before
D. while
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．
A．when B．as C．before D．while
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