in the past years ,there ____great changes inin the past years ,there ____great changes in my home town是填are还是have been?

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inthepastyears,there____greatchangesininthepastyears,there____greatchangesinmyhometown是填are还是havebee

in the past years ,there ____great changes inin the past years ,there ____great changes in my home town是填are还是have been?
in the past years ,there ____great changes in
in the past years ,there ____great changes in my home town是填are还是have been?

in the past years ,there ____great changes inin the past years ,there ____great changes in my home town是填are还是have been?
have been啊,现在完成时

have been
这里用现在完成时
望采纳啊啊

我觉得是are there be 句型……