8．---What are you doing，Simon？
---I have finished my homework，and now I ______ the computer games．（　　）
A．playedB．was playingC．am playingD．play

分析 --Simon，你在做什么？
--我已經(jīng)完成作業(yè)了，現(xiàn)在正在玩電腦游戲．

解答 答案：C
根據(jù)時間狀語now判斷用現(xiàn)在進(jìn)行時．現(xiàn)在進(jìn)行時的構(gòu)成是：主語+am/is/are+動詞的現(xiàn)在分詞；主語是I，be動詞用am，play的現(xiàn)在分詞是playing．故答案為C．

點評 本題考查了動詞的時態(tài)．做題時，一定要特別關(guān)注有關(guān)的時間短語，這是判斷句子時態(tài)的標(biāo)志．在沒有時間狀語的情況下可以聯(lián)系上下文根據(jù)語境來做出正確判斷．

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