If you happen to see the process of cooking in a restaurant, you might see the cook using rubbish oil, which is a mon _____ in China nowadays.
A.sense
B.rule
C.practice
D.activity
网友回答
A解析考查词义辨析，sense意识，rule规则，practice实践，activity活动，a mon sense 常识，为固定短语，故选A。