问题补充：
When we are in a new place, we must our manners and try to follow the customs of the place.
A. look out
B. keep eyes out
C. mind
D. put up with
答案：
A. look out
B. keep eyes out
(答案→)C. mind
D. put up with
解析：mind ，动词注意。Mind the wet paint.当心油漆未干
