-- You look tired Miss Green.--yeah . Icomputer games for two hours.A. playB. was playing

问题补充：

-- You look tired， Miss Green.

--yeah . Icomputer games for two hours.

A. play

B. was playing

C. have been playing

D. am playing

答案：

A. play

B. was playing

(答案→)C. have been playing

D. am playing

解析：句意：你看起来很累，格林先生。——是的，我一直玩了两个小时的电脑游戏。结合语境可知下文描述的是从过去一直持续到现在的动作，故用完成进行时态，选C。