How long does a snake sleep? It ______ for eighteen ______ a day. A. sleep, hour B. sleeps, hours C. slept, hours
— What’s your new math teacher like?— Oh, he is very kind, ________ he looks serious.
—Teenagers _______ allowed to drive a car. — That’s true. It’s too dangerous for them to drive a car.
----What can I do with so much money?----If I _______ you, I _______ give it away to charity.
—I hear Yang Yan made an English speech at school yesterday.—_______, and _______.
— Listen! Is that Linda singing in the next room?— No, it ________ be her. She is still in Shanghai.