—________ you open the window, please? —Yes, I can.

That bicycle ________ belong to Judy. It’s much too big for her.

— Must we get to the theater at 7:00?— No, you _______. The movie begins at 8:00.

If you _____the book, you ____ buy it right now, I think.

—Look, someone is coming. Guess who ____________.—Jack. He’s always on time.

—Jim, ________ you answer the last question? -- Sorry, I can’t. It’s too hard.

We _______ talk loudly when we see the sign “ Be quiet ”on the right. 

--- May we leave the classroom now? --- No, you ____________ . You ____________ to leave before the bell rings.

—Could you please come to the museum with me this afternoon?—Sorry，I ________．I have to take a piano lesson at 2 pm．

--- ______ you give your seat to this old man? --- Of course. 

—Dad, must I do my homework now?—No. You_____play games with your friends for a little while. 

--Listen! Kate is playing the piano in the next room.　　--It _______________be Kate. She has gone to Hangzhou to visit the Cross-sea Bridge.

--Just a minute. I’ll go to get some apples for you.--Thanks, but you      get too many. One is enough.

Today’s work ____ today. Never leave it till tomorrow.

—To make our city more beautiful, rubbish         into the river. —I agree.

--Let’s go to the Tian’anmen Square by taxi. --Oh, it’s not far from here. We_______ take a taxi.

 ------What kind of house do you want to have? Something big ? ------Well, it _______ be big.—That’s not important.

 .Susan’s parents have bought a large house with a swimming pool. It ______be very expensive.

Tina_________wait _________ see her parents .

– Look at the lady there. ______ it be Miss Li? -- No, it ______ be her. She left for Paris this morning.