问题描述：
have been to是延续性动词吗?如果不是,那么在现在完成时里这句话里有since能用have been
Not only his parents but also his grandfather _____to a lot of places of interest in our country since they came here.
A.has gone B.has been C.have gone D.have been
Not only his parents but also his grandfather _____to a lot of places of interest in our country since they came here.
A.has gone B.has been C.have gone D.have been
问题解答：
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