---The book _____ be Tom’s.---No, it _____ be his. There’s a name on the book. It’s Jim’s.
This problem is so tough that only______ students can solve it.
Although you have lots of difficulties, you must ______your work.
He _____get up late, but now he gets up earlier.
Nothing can ______ the girl from _____ there.
---Are you going to go shopping this afternoon? ---No,I'm _____ tired _____go.