题目内容
12、Johanna waited at the bus stop for nearly an hour ___ the bus finally arrived．
A．when B．unless C．before D．after
试题答案
12、C
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Johanna waited at the bus stop for nearly an hour ___ the bus finally arrived．
A．when B．unless C．before D．after
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Johanna waited at the bus stop for nearly an hour ___ the bus finally arrived.
| A．when | B．unless | C．before | D．after |