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The famous scholar ______ in America for many years,but he's

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The famous scholar ______ in America for many years,but he's never regretted his
The famous scholar ______ in America for many years,but he's never regretted his final decision to move back to China.
A.lived B.was living C.have lived D.had lived
为什么不用D呢?D的话不是表示到他做这个决定之前,到回国内为止已经住了很多年?不是有for吗?怎么能用A呢?
The famous scholar ______ in America for many years,but he's
过去完成时是在有过去式的情况下用的,而这个句子后面he's never regretted用的是现在完成时时.如果没有过去时间的比照,就不要用过去完成时,反而用过去式比较安全.