It is not a good habit _________ in public places.to do sth 还是 doing sth?
问题描述：
It is not a good habit _________ in public places.
to do sth 还是 doing sth?
答
to do 吧
答
to do sth
答
doing
examples:
It is not a good habit smoking in public places.
(since it is a habit,you are doing that already.To do something means haven;'t done yet.)
you can say,
It is not good to smoke in public places.