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I______seen Jenny for three years. She changed a lot.

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I______seen Jenny for three years. She changed a lot.
a.have seen b.haven't seen c.am seeing d.hadn't seen
到底该选哪个,请详细说一下原因,谢谢!
I______seen Jenny for three years. She changed a lot.
按照语义来看应该是b\d两个中的一个,因为意思是我很久没看到她了,她变了很多
然后b和d中应该选b,所谓现在完成时么,就是到现在为止,我很久没见过她了,而过去完成时一定要有一个过去的时态做参照才可以