【題目】It is nearly 50 years ______ the People’s Republic of China was founded.

A. after B. before

C. when D. since

【答案】D

【解析】考查連詞辨析。A. after在……之后;B. before在……之前;C. when當(dāng)……的時(shí)候;D. since自從。句型:It is/has+時(shí)間段 since+一般過去時(shí)的句子“……已經(jīng)有多長(zhǎng)時(shí)間了”。句意:中華人民共和國(guó)建立已有50年了。故選D。

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