Flu is a very infectious disease. Fever, headaches, coughing and fatigue are some of its symptoms.
A. normal; mon
B. usual; ordinary
C. mon; usual
D. ordinary; normal
网友回答
A. normal; mon
B. usual; ordinary
(答案→)C. mon; usual
D. ordinary; normal
解析：考查形容词辨析：normal;正常的， mon共同的，常见的， usual; 平常的，ordinary普通的，句意是：流感是很常见的传染病，发烧，头疼，咳嗽，疲劳是它平常的症状。选C。