问题补充：
Once you the habit of smoking, it is hard to quit.
A. get over
B. get into
C. get through
D. get up
答案：
A. get over
(答案→)B. get into
C. get through
D. get up
解析：考查词组：A. get over克服B. get into染上C. get through接通，完成D. get up起床，句意：一旦你染上抽烟的习惯，就很难戒掉。选B。
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