—Allan looks tired out—Sure. He in the gym for two hours. A. works outB. had worked out

问题补充：

—Allan looks tired out.

—Sure. He in the gym for two hours.

A. works out

B. had worked out

C. has been working out

D. was working out

答案：

A. works out

B. had worked out

C. has been working out

D. was working out

解析：本题考查动词时态。句意为;——阿兰看上去很疲惫。——当然了,他在健身房里连续健身锻炼了两个小时了。根据looks的时态排除B、D两项。A项是一般现在时,表示经常性、习惯性的动作。而C项为现在完成进行时,表示过去发生,持续到现在而且有可能继续持续下去的动作。