How cold the weather is! I wonder how the crops survive under such heavy snow? — Don’t worry. There is a lot of air in loose snow which _____the cold.

It is no use to _____ the stupidity of his behavior to him, because he will never listen to your advice.

Hi， Ann. How can you improve your English so much— Oh， nothing difficult. The _____ you work at it， the _____ progress you will make.

Last Sunday I went to visit the History Museum where I saw a pot _________ about 1,000 years before.

Tina is a _____ girl.