The police tried to get some clues from the suspect but he remained.A. silentB. quietC. c

问题补充：

The police tried to get some clues from the suspect, but he remained.

A. silent

B. quiet

C. calm

D. secret

答案：

(答案→)A. silent

B. quiet

C. calm

D. secret

解析：本题考查形容词。remain silence保持沉默，固定词组。quiet安静；calm平静；secret秘密。选A。