Business etiquette can be defined as behavior norms that should be abided by business people in their working activities.

Desks in straight rows in a traditional classroom imply ______. A: the importance of facial expressions B: group work is not welcome in class C: strict rules that must be abided by D: the absolute authority of teachers

I asked the waitress to refill my coffee cup and she happily ______ repeatedly until I had consumed enough coffee to stay up all night and study for my exam. A: obey B: abided C: complied D: observance