mark --- in china for ten years and now he teaches chinese in britaina\ has workedb\ workedc\ had workedd\ is working说理由!
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mark---inchinafortenyearsandnowheteacheschineseinbritaina\hasworkedb\workedc\hadworkedd\isworking说理由
mark --- in china for ten years and now he teaches chinese in britaina\ has workedb\ workedc\ had workedd\ is working说理由!
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!
mark --- in china for ten years and now he teaches chinese in britaina\ has workedb\ workedc\ had workedd\ is working说理由!
答案选C
用过去完成时