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

Are you busy today?—Yes, I have ______ homework to do.

Martha is a girl. She always smiles and says hello to others.

What’s this?—It’s a machine which was invented in __________century in China.

He grabbed his suitcase and gave the impression ___he was boarding the Tokyo plane.