—Mr. Smith _____ in Russia for 10 years.
—No wonder he can speak Russian fluently and now teaches Russian in a Chinese college.
A.had stayed | B.has stayed | C.stayed | D.stays |
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—Mr. Smith _____ in Russia for 10 years.
—No wonder he can speak Russian fluently and now teaches Russian in a Chinese college.
A.had stayed | B.has stayed | C.stayed | D.stays |