题目

—Great changes have taken place　　　　　we enter E-Times. —Yeah. I agree with you. A. before               B. as soon as C. when                 D. since 答案：选D。考查连词辨析。句意: ——自从我们进入电子时代以来, 已经发生了巨大变化。——是的。我同意你(的观点)。before“在……以前”; as soon as“一……就……”; when“当……时”; since“自从……以来”, 其引导的时间状语常与完成时连用。故选D。

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