题目内容
【题目】—Why didn't you try your best to get on the bus?
—I tried to, but it had started moving ________ I could get on it.
A．before B．after C．since D．if
【答案】A
【解析】后句话句意：我尽力了，但我还没来得及上去它就开始走了。这句话也就是说“车在我上去之前，已经开走了。”故此处填before.
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