It’s cold outside. ______ your sweater before you go out.

The house could fall down soon if no one some quick repair work.

I am going to spend my holiday in the countryside. — ________. The air there is fresh and the views are attractive as well.

Garth Brooks’ records sell well. He has sold more than 120 ____ records. –But I still hope to see him live one day.

Listen! Is Kitty in the next room? —- No, it ______ be Kitty. She has gone to Beijing.