He _____ in this factory for 20 years already.

A．will work B．works
C．has worked D．is working

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(dòng)作，故用現(xiàn)在完成時(shí)態(tài)。選C。
考點(diǎn)：考查時(shí)態(tài)辨析

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