【題目】He _____ in this factory for 20 years already.

A. will work B. works

C. has worked D. is working

【答案】C

【解析】

試題分析：句意：他已經(jīng)在這家工廠工作20年了。結(jié)合語境可知本句描述的是從過去一直持續(xù)到現(xiàn)在的動作，故用現(xiàn)在完成時態(tài)。選C。

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