The knowledge that his friends have deserted him is a (n) pill for Mr. Smith to swallow.
A. extra
B. mon
C. bitter
D. effective
网友回答
A. extra
B. mon
(答案→)C. bitter
D. effective
解析：考查形容词：A. extra额外的，B. mon普通的，C. bitter痛苦的，D. effective有效的，句意：知道朋友抛弃了他是斯密斯先生吞下的苦药。选C。