—Are you going to go skiing in Zhangbei next month? —I’m not sure. It all depends on _______ then. A. if I’m free B. when will I have time C. if I’ll have enough time
---Mr. Wu, why can’t I always get good grades in study?
---Well, if you are _______ in class and read _______ books after class. I’m sure you will get better grades in the future.