一Let’s get off the bus at the bus stop .
一Be careful! Don’t get off___________ it has stopped .
A . when B . since C . while D . until
科目：初中英語 來源： 題型：
一Let’s get off the bus at the bus stop .
一Be careful! Don’t get off___________ it has stopped .
A . when B . since C . while D . until
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