---What are you doing now?---I computer games with my sister.A. playB. am playingC. plays

问题补充：

---What are you doing now?

---I computer games with my sister.

A. play

B. am playing

C. plays

D. played

答案：

A. play

(答案→)B. am playing

C. plays

D. played

解析：考查时态。问句用的是现在进行时态，意为你现在正在跟什么呢？所以答语也应用现在进行时态，选B，意为我正在和我的妹妹玩电脑游戏。