The workers were so tired that they fell asleep where they without undressing.
A. lying
B. were lying
C. lied
D. were lain
网友回答
A. lying
(答案→)B. were lying
C. lied
D. were lain
解析：句意：工人们如此得累以致于他们没有脱衣就睡着了在他们躺的地方。这里缺少的谓语动词，故排除A，主语与动词之间是主动关系。故排除D；lied是说谎的过去式，根据句意故选B。