--Must we move to the next room?--No, you____________ . You may still live here if you like.

We can hardly believe such a young boy ______ travel around the world all by himself.

–________ you turn down your radio, please? –Yes, I can.

－ Whose is this blue bike? －It ________ be Mary’s. Her bike is black and white. 

Curious about the world around him, my son__   __ask me endless questions when he was young．