Question

—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

Answer 1

A

试题分析：考查连词辨析。句意：——你知道发生在市中心的那起事故吗？——知道。但过了一段时间之后我才知道真相。答案选A。 句型：It was some time before……表示“过了一段时间之后才……”。