答案选C
用过去完成时
mark --- in china for ten years and now he teaches chinese in britain
mark --- in china for ten years and now he teaches chinese in britain
a\ has worked
b\ worked
c\ had worked
d\ is working
说理由!
a\ has worked
b\ worked
c\ had worked
d\ is working
说理由!
英语人气：186 ℃时间：2019-11-09 14:51:22
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