There____great changes in our country since 1979

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There____great changes in our country since 1979
A have been B were Chas been D are?选哪个?

选 A have been
因为后面的时间词 since 1979,表示的是从1979年以来,所以用完成时.
而主语 great changes 是复数,所以用 have been.
再问： great changes 是复数，所以用 have been？复数就用have been？那单数用什么？
再答：单数就用 has been

There____great changes in our country since 1979 There have been great changes in our country since 1990. There ___has been_______ great changes in our country since Great changes __________ in our country since 1978.(take pla There _____(be) great changes in our country since 1979.谁若知道 There ______(be) great changes in our country since 1979.用所给英语作文《Changes in our country》 In the past few years there____great changes in my hometown. There（be）great change in our country since 1979 Great changes______ in our country since 1980. The changes about our country have brought many benefits in There great changes in our country.(填空题)