There ________ great changes in China in the past twenty years. All of us are proud of it. A.have be...
2022-05-24 19:04:01 89次 2020年天津市毕业班模拟（一模）英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
There ________ great changes in China in the past twenty years. All of us are proud of it.
A.have been B.has been C.was D.were
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