It is colder than yesterday; put on more clothes or you will catch a cold.
A. frequently
B. fortunately
C. slightly
D. generally
网友回答
A. frequently
B. fortunately
(答案→)C. slightly
D. generally
解析：考查副词：A. frequently频繁地B. fortunately幸运地C. slightly轻微地 D. generally一般地，句意：今天比昨天稍微冷一些，多穿些衣服，否则你会冷的。选C。