- Some students often drop litter carelessly in our school. What can we do?- We can _______ some signs to remind them not to do that again.
#52736
A
put up
B
put off
C
put away
D
put on
推荐题目
 David visited lots of _______ in the world. 
#51984
A
places of interesting
B
places of interest
C
place of interests
D
place of interesting
 It is not polite to      those persons in trouble.
#56334
A
laugh to
B
laugh with
C
laugh of
D
laugh at