It was very late but the teachers were working hard in the office.A. almost B. alreadyC

问题补充：

It was very late, but the teachers were working hard in the office.

A. almost

B. already

C. still

D. ever

答案：

A. almost

B. already

(答案→)C. still

D. ever

解析：句意：虽然很晚了，但老师仍然在办公室里努力的工作。almost意思是几乎，差不多；already意思是已经；still意思是仍然；ever曾经意思是 根据句意故选C。