I tried hard to get some information about the new technology out of his mouth but he rema

问题补充：

I tried hard to get some information about the new technology out of his mouth,but he remained .

A. quiet

B. secret

C. silent

D. calm

答案：

A. quiet

B. secret

(答案→)C. silent

D. calm

解析：从句子中的前部分可知“我想得到一些技术信息”,因此选silent,沉默不说。quiet安静,不吵闹；secret秘密的；calm镇定,不激动。