— Do you know who teaches ______ Chinese? — Yes . Mr Wang does.

—The shoes don’t fit me. Would you please show me ______ ?—Sure. Here you are.

－Is that your bike, in front of the black one?        －No. It’s ______. 

----Whose model plane is it?    ----It’s ________. 

—Sally, could you go and help your father wash the car?—Why ____________? I’m busy now. Amy is lying on the grass doing nothing.