Question

— You look tired.
— Yes. I ___ non-stop until 8 o’clock.

A．had worked

B．work

C．have worked

D．was working

Answer 1

A

考察时态。句意：你看起来很累。——是的，我昨晚知道八点才睡觉。可知下文描述的是在过去某个时间点已完成的动作，故用过去完成时态，选A。