You look tired．Youd better ____a good sleep．

—The room is so dirty. ________ we clean it?—Of course.

—Must I get up early tomorrow?—No, ________.

—Who’s that woman with Ann?—I’m not sure. It   be her mother

—May I take this book out of the reading room?—    .Please read it here.

—I was told to be here before eight.—Oh ,you    . I’m sorry for not telling you that we have changed

You ___ open the door before the train gets into the station.

Schools _____allow students at least one hour a day for sports．

You ______ worry about him. He will get well soon.

—I think Miss Gao must be in the library. She said she would go there.— No, she ________ be there. I

— Shall I book some seats for the concert?—_____________. I’ve already done that.

As we know, fish ___die out of water.

You     play with fire, Tom. Its dangerous.

—Could I go to the movie this weekend，Dad?一Yes，you____．But you have to come back before nine．

— ______ I fill in the check-in form right now, sir?— No, you needn’t. You can complete it this afte

—Must I hand in the report now, sir? —_____________. You can hand it in tomorrow.

— Must I return the book to you now? — __________, you__________. You can do it tomorrow.

—May I fish here? —Sorry, you ________. Look at the sign “No fishing”!

—It’s very cold outside. —Oh, yes. You’d better________ your coat.

It’s getting dark. You’d better ________ out by yourself. It’s dangerous.

Time is limited! Youd better________your time any more.

We _________ try our best to fight against pollution.

—Sorry, Miss Chen. I missed the early bus, so I was late again.—It doesn’t matter this time. You ___

We ________ eat or drink in the museum. It is against the rule.

I love the weekends,because I ________ get up early on Saturdays and Sundays.