______ are good friends. 

This isn’t my T-shirt. ______ is blue.

—Excuse me. I want to buy some stamps. Where can I find a post office?—I know _______ is not far from here. You can easily find _______.

—Yesterday I lost my pencil sharpener.  I couldn’t find_______.—Oh, it’s a pity. You’d better buy ________ this afternoon.

—Mike，is this Tom’s pencil?—Oh，yes，it is         ！