2012杭州中考英语Mark _________ in China for 10 years and now he teaches Chinese in Britain.A.has worked B.worked C.had worked D.is working答案为Bwhy?

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2012杭州中考英语Mark _________ in China for 10 years and now he teaches Chinese in Britain.A.has worked B.worked C.had worked D.is working答案为Bwhy?
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2012杭州中考英语Mark _________ in China for 10 years and now he teaches Chinese in Britain.A.has worked B.worked C.had worked D.is working答案为Bwhy?
2012杭州中考英语
Mark _________ in China for 10 years and now he teaches Chinese in Britain.
A.has worked B.worked C.had worked D.is working
答案为Bwhy?

2012杭州中考英语Mark _________ in China for 10 years and now he teaches Chinese in Britain.A.has worked B.worked C.had worked D.is working答案为Bwhy?
因为如果为A说明现在仍在中国;后句起到了暗示作用;说明前句已经成为过去.
你看看现在完成时态的定义.