公务接待的基本原则是（）。
A.分清主次、确定规格
B.尊重习惯、热情周到
C.对口接待
D.以人为本
参考答案：A, B, C, D
—What do you think of your teachers?
—Not all the teachers are very strict ________ their students. [ ]
A. in
B. with
C. for
D. to
何为公海？
