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