Our English teacher is very nice.We _____ friends since three years ago.A.were B.became C.have选c还是d 为什么?c have been d have made

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Our English teacher is very nice.We _____ friends since three years ago.A.were B.became C.have选c还是d 为什么?c have been d have made
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Our English teacher is very nice.We _____ friends since three years ago.A.were B.became C.have选c还是d 为什么?c have been d have made
Our English teacher is very nice.We _____ friends since three years ago.A.were B.became C.have
选c还是d 为什么?
c have been d have made

Our English teacher is very nice.We _____ friends since three years ago.A.were B.became C.have选c还是d 为什么?c have been d have made
答案应该是 have been
时间状语是 since years ago ,是现在完成时的标志.become 是短暂性动词,不能和一段时间连用,所以用延续性动词 have been .
意思是:我们的英语老师很好.自从三年以前我们就是朋友了.

这个网自己看

选择c.............................................