It’s too hot．Would you mind the door?—,please do it now．

We are sure one day the air in Beijing will be much ______ than today.

He is so careless that he often_______his school things at home.

Where is your father?—He isn’t here. He __________ Yushu to help the people in trouble.

Do you know the cost of buying a house in Shanghai is much higher than __ in Tibet? —Of course, I know. It’s impossible for me to buy_____ there.