1 . 很多吸烟者都意识到吸烟对他们健康的危害，所以他们努力戒烟。
Most smokers________ ________ ________ ________the dangers to their own health, so they try hard to quit it.

2 . 他看起来是一个小气的人，但骨子里他很善良。
He might look like a mean man, but deep ________ inside he is a very kind person.

3 . 这个淘气的孩子总是把房间的东西搞得乱七八糟。
The naughty child is always turning everything in the room ________ ________.