--Do you live by yourself, Mr. Wang?
--Yes. I have two sons, but ________ of them lives with me. They are now studying in America.
--What are you doing, Cathy?
--I'm ________ my cat. I can't find it.
---Hello, Mike!
---Oh, hello, Tom, it's you．I ________ you ________ here in Beijing．
--I always listen to the teacher ________ in class.
--It's very clever of you to do that.
---The front door refuses to open．
---Why not ________ the back one?
--Do you like the pop star Zhou Jielun or the movie star Liu Dehua?
--________, I am not their fan.
--- I'm going to Jinan with my teachers.
--- ______!
---Dad, look at the building. It is on fire.
---Call 119 ______ mobile phone right now.
---Who will be ________ duty tomorrow?
---Susan will．
---How are you going to meet your aunt at the airport ______ Thursday morning?
---I'm going there ______ my car.