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
网友回答
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。