— You look tired.— Yes. I non-stop until 8 o’clock this morning.A. had workedB. workC. ha

问题补充：

— You look tired.

— Yes. I non-stop until 8 o’clock this morning.

A. had worked

B. work

C. have worked

D. was working

答案：

(答案→)A. had worked

B. work

C. have worked

D. was working

解析：考查时态.句意:你看起来很累.——是的。我一直不停的工作到今天早上八点钟。可知句子描述的是过去发生已经完成的动作，故用过去完成时态。选A。