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英语
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It is 50 years ___the People's Republic of China was founded.
A.after
B.before
C.when
D.since
人气：104 ℃ 时间：2019-11-02 08:32:01
解答
D
It is/has+时间段 since+一般过去时的句子.意为：.已经有.(多长时间了）
本题：中华人民共和国建立已有50年了
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