题目内容


— Did he realize the serious situation immediately?
— No. It was quite a long time ________ he really realized it.
A.now thatB.whenC.ever sinceD.before
D
连词辨析。A.既然;由于   B.当……时C. 从那时到现在   D. 在……之前。句意:他理解意识到了这严重的情况吗?——不,在他真正意识到它之前,有相当长一段时间。故选D。
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