You must do your homework now; you ________ computer games all the evening.
A．have been playingB．are playing
C．playD．played
A

試題分析：考查時態(tài)。本題關鍵詞在于all the evening整個晚上；通常與現(xiàn)在完成進行時連用，句意：你現(xiàn)在必須得做家庭作業(yè)了，你整個晚上都一直在玩電腦游戲。故A正確。
考點：
點評：時態(tài)考查關鍵要看時間狀語。本題的關鍵是在all the evening,該短語常與現(xiàn)在完成進行時連用。
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