We must know what we should do and what we should avoid _______ a good impression on others in public places.
#88902
A
to leave
B
leaving
C
to have left
D
leave
推荐题目
I'll have you ______ English in six months . 
#98544
A
speaking
B
speak
C
spoken
D
be able to speak
Mary escaped __________ for her coming late for school this morning.
#89930
A
from punishment
B
punishing
C
being punished
D
from punishing
The children went back home from the grammar school, their lessons ________ for the day.
#91666
A
finishing
B
had been finished
C
finished
D
had finished