Carter was saying all the right things, but his smile was , and I knew I couldn't trust him.
A. preferential
B. artificial
C. confidential
D. beneficial
网友回答
A. preferential
(答案→)B. artificial
C. confidential
D. beneficial
解析：形容词辨析。A偏爱的；B人造的，虚假的；C秘密的；D有利的，有益的；句意：Kate正在说的事情都是正确的，但是他的笑容很虚伪，我知道我不能信任他。故B正确。