We ___________ for a long time. Shall we play for a while?

A．study B．Studied C．have studied D．a(chǎn)re studying

C

解析試題分析：句意：我們已經(jīng)學(xué)習(xí)了這么長時(shí)間了。玩一會(huì)兒好嗎？結(jié)合語境可知前文描述的是一直持續(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)：考查動(dòng)詞時(shí)態(tài)。

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