The students not to talk loudly in the reading-room.A. have toldB. are toldC. will tellD.

问题补充：

The students not to talk loudly in the reading-room.

A. have told

B. are told

C. will tell

D. are telling

答案：

A. have told

(答案→)B. are told

C. will tell

D. are telling

解析：根据句子意思可知本题需要考查的是被动语态，故选B