It was already past midnight and only three young men in the tea house.A. leftB. remained

问题补充：

It was already past midnight and only three young men in the tea house.

A. left

B. remained

C. delayed

D. deserted

答案：

A. left

(答案→)B. remained

C. delayed

D. deserted

解析：句意：早已过了半夜，仅有3位年轻人还留在茶房。“remain”作系动词，后可跟名词、介词短语、现在分词、过去分词。不定式的被动式作表语。