1 . 陷入这种习惯很容易，戒掉它却很难。
_________ into the habit was easy, but it was difficult to ________ the habit.

2 . 我有点担心在高级课程中无法跟上其他学生，而且要适应所有的作业会相当困难。
I’m a bit worried about ________the other students in my advanced course, and _______ get used to all the homework.