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单选题
Big changes have taken place at Marketing Department ______ the new manager came.
A
before
B
after
C
since
D
while
参考答案
参考解析
解析：
句意：自从新经理上任以来，市场部已经发生了巨大的变化。本题考查连词辨析。since可以引导时间状语从句，表示“自从……”，多与完成时连用。因此C项正确。before在……之前。after在……之后。while当……时候；然而。
句意：自从新经理上任以来，市场部已经发生了巨大的变化。本题考查连词辨析。since可以引导时间状语从句，表示“自从……”，多与完成时连用。因此C项正确。before在……之前。after在……之后。while当……时候；然而。
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