We must keep a secret of the things here the general said 　 at the man in charge of the

问题补充：

We must keep a secret of the things here, the general said, at the man in charge of the information office.

A. discussed, stared seriously

B. being discussed, seriously staring

C. to be discussed, seriously stared

D. discussed, stared

答案：

A. discussed, stared seriously

(答案→)B. being discussed, seriously staring

C. to be discussed, seriously stared

D. discussed, stared

解析：考查非谓语动词。“长官说：‘我们必须对正在被讨论的事情保密’，严肃地盯着信息部的负责人。”things和discuss之间是动宾关系，排除A、D；the general和stare是主谓关系，应该用主动形式。故选B。