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-The Greens are no longer living here?

-No, ever since they moved to the country, they ________ better health.

[  ]
A.

could have enjoyed

B.

had enjoyed

C.

have been enjoying

D.

are enjoying

答案:C
提示:

ever since所引导的从句中,主句谓语动词应用完成时或完成进行时。


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