According to the school rules, no student _______ go out of school without the permission of the teachers.

If the students who killed themselves had only been more confident, their deaths ________.

—Can we leave the classroom now?—No, you _________. You _________ to leave until the bell rings.

---I have sore eyes.  ---You _____ play computer games too long.

—What’s the advantage of shopping online?—I think buyers        spend a lot of time going to shops.

一What will the weather be like tomorrow?一It     be rainy ,cloudy or sunny．Who knows? Even the weather report is not always right.

–Mom, must I stay there the whole day?--No, you______. You ____ come back after lunch, if you like.

—Could I enter the apartment to look for my sister?—Sorry, you ______. Men _______ go into the apartment for girls.

 ---Look! The light is still on. Is Mr Wu working in his office？---No, it _____ be Mr Wu. He has gone to Nanjing for a meeting. 

—Paul has lost her iphone 5.    —No, it ___be in her bag. I _______ hear it.

—________ we finish the work before class, Jack?—No, we_________ . We can do it after class.

 —Must I go to medical school and be a doctor like you, dad?—No, you _______,son. You’re free to make your own decision.

 –Is that Kate’s car?--It ______be hers. She has just gone for a meeting.

 -- Whose French book is it?-- It __________ be Lucy’s. Look! Her name is on the book!

 John ______ leave for New York tomorrow, but I’m not sure.

— Must I stay here with you?— No, you          . You may go home, but you           go to the net bar (网吧).

-- Can you play the piano?-- ____________________________.

–Do we have to talk with Jack about that matter?–Yes, I think we __________.

 —Boy, you _______ lean (伸) out of the window while the bus is running. That’s dangerous.—Sorry, I won’t do that again.

— John, do you have any plans for this weekend?— I’m not sure. I _______ go fishing with my uncle.