– Who didn’t turn off the light after school yesterday?– It ______ be Lucy. She told me she was the last one to leave the classroom.

There’s still an hour left, you _____ go in a hurry. 

 -- There were already five people in the taxi, but the driver managed to take me as well.  --It ________ a comfortable journey.

The lady in this photo ________ be over fifty! She looks so young!

–Someone is knocking at the door. Who ______ it be? --It         be Victor. He has gone to London yesterday.

-       you paint?-Yes, I can. So I want to join the art club.

---Where is Tom?        ---He hasn’t come to school today. I think he        be ill.

—Whose workbook is this, Tony?—Look! Ann's name is on it! It ______ be hers.

---Could I go boating this weekend, Dad?---Yes, you ________. But you ________ come back before lunch.

–Can you swim? --___________, but my brother Tom can. 

 — Shall I tell John about it ?— No , you         . I’ve told him already .

The man over there _________ be over fifty. He looks so young.

—Mom,          I play computer games?—Yes, you can. But you have to finish your homework first. 

You have finished most of the work, so you ______ start working so early tomorrow. You ______ come at 9:00.

 ---  ________ have you kept the book ? --- Since last Month. I ________ return it to the library today or I can’t borrow one next time. 

_______ you tell me how I_______ get to the No．168 Middle School?

—_____I bring my ID card with me next time?—No, you needn’t. I have copied and stored it in my computer.

My pen doesn’t work well. Could I borrow _____, John?

— Who’s that man over there standing in the garden? Is it Mr. White?—It __________ be him. He has gone to Shanghai on business. 

--- _________ David be the new chairperson of the Students’ Union? --- He ________ be, but I’m not sure.