I tried hard to get some information about the new technology from him but he remained .A

问题补充：

I tried hard to get some information about the new technology from him, but he remained .

A. peaceful

B. skilful

C. silent

D. calm

答案：

A. peaceful

B. skilful

(答案→)C. silent

D. calm

解析：形容词辨析。A和平的；B熟练的；C沉默；D镇定的；句意：我努力想从他努力得到一些关于新的技术的信息，但是他保持沉默。故C正确。