问题
选择题
We must know what we should do and what we should avoid ______a good impression on others in public place.
A.to leave
B.leaving
C.to have left
D.leave
答案
答案:A
We must know what we should do and what we should avoid ______a good impression on others in public place.
A.to leave
B.leaving
C.to have left
D.leave
答案:A