题目内容

—Do you know about the accident which happened in the center of the city?
—Yes. But it was some time           we realized the truth.

A.before B.when
C.since D.Until

A

解析试题分析:句意:-你知道那起发生在市中心的事故吗?-是呀,过了一段时间后我们就了解那个实况。It +时间段+before…“过了一段时间就…”故A正确
考点:考查固定搭配

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