Question

【题目】—Great changes have taken place _____ we enter E-Times.
—Yeah. I agree with you.
A.since
B.as soon as
C.when
D.before

Answer 1

【答案】A
【解析】句意：—自从我们进入电子时代以来，发生了巨大变化。—是的。我同意你(的观点)。have taken place 是现在完成时，后面的时间状语需要能和现在完成时连用； since“自从……以来”， 其引导的时间状语常与完成时连用。所以答案是A。