–Who should be responsible for the accident?--The boss not the workers. They just carried

问题补充：

–Who should be responsible for the accident?

--The boss, not the workers. They just carried out the order .

A. as told

B. as are told

C. as telling

D. as they told

答案：

(答案→)A. as told

B. as are told

C. as telling

D. as they told

解析：as told=as they were told，此处是as引导的方式状语从句的省略。当从句主语与主句主语一致，且谓语动词含有be时，将从句的主语和be省略。又因为workers与tell之间是被动关系，排除C、D。