单项选择题

We reached the station ________ the train had left．

A．before
B．after
C．until
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单项选择题
Things are getting ________ and ________.
A．bad.., worse
B．worse.., worst
C．worse.., worse
单项选择题
He ________ but ________ nothing.
A．heard.., listened
B．listened.., heard
C．listened to... heard
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