---- You look tired.
---- Yeah, I since 4 o’clock.
A. had played
B. have been playing
C. am playing
D. have been played
网友回答
A. had played
(答案→)B. have been playing
C. am playing
D. have been played
解析：本题的含义是你看起来累了。是的，我自从4点钟就一直玩到现在，表示过去的事一直持续到现在，而且现在正在进行，可用完成进行时，结构为have been doing，故本题选B。