You will lose the game _________ you try your best.A. when B. if C. unless
—Listen! Someone is singing in the next room. Who ____ it be? Is it Li Wei?—No, it ______ be her. She is at school now.
The hair band isn’t _______. It belongs to _______.
—What ____ cold weather!—Yes, But it’s ____ unusual experience for us. We normally live in a hot place.
These problems are hard to . Will you give me some advice?
---What a traffic jam! I’m going to be late again.---Yes. The traffic now is than it used to be.