We ___________ for a long time. Shall we play for a while?
A．studyB．StudiedC．have studiedD．a(chǎn)re studying
C

試題分析：句意：我們已經(jīng)學習了這么長時間了。玩一會兒好嗎？結(jié)合語境可知前文描述的是一直持續(xù)到現(xiàn)在的動作，故用現(xiàn)在完成時態(tài)，選C。
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