—I'm too busy preparing the exam. Could you do _______to help me?—Of course. I can do _______for you if you want me to.

For many seniors in some universities, the final year can be an unpleasant experience, _______ that ends the campus romance.

 It's an either-or situation - we can Buy a new car this year or we can go on holiday But we can’t do     .

It was probably at that moment _____ I understood what kindness really was.

—There is still a copy of the book in the library．Will you go and borrow _____?—No．I’d rather buy ______ in the bookstore．