I can’t leave the office now. A lot of work to be done.A. is remainedB. leftC. remainsD.

问题补充：

I can’t leave the office now. A lot of work to be done.

A. is remained

B. left

C. remains

D. have

答案：

A. is remained

B. left

(答案→)C. remains

D. have

解析：remain留下，不及物动词，不能用被动，故排除A；句意：我现在还不能离开办公室，有许多工作需要做。