问题
You’re coughing badly，Martin. Why not give up smoking?—Give up smoking？Easier said than done，Amy. Once you ______ the habit of smoking，it is very hard for you to ______.
A:keep up; break it away
B:take up; drop it out
C:pick up; get rid of it
D:build up; do away with it
B:take up; drop it out
C:pick up; get rid of it
D:build up; do away with it
正确答案是：
