There______ great changes in our country since 1979. [ ]A. have beenB. were C. has beenD. are-初中英语-n多题

◎ 题干

There______ great changes in our country since 1979.

[ ]

A. have been
B. were
C. has been
D. are

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◎ 解析

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◎ 知识点

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