As it reported, it is 100 years _____________ Tsinghua University was founded.

A.when B.before C.a(chǎn)fter D.since 

D

解析試題分析:句意:根據(jù)報道,清華大學(xué)已經(jīng)建校100年了。句中采用了since在現(xiàn)在完成時當中的一個固定結(jié)構(gòu),即It is+時間段+since+從句(從句需要用一般過去時)。
考點: 連詞的用法。

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