Is this_____ computer game?— Yes, _____ is. It’s _____ computer game.

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.

There is no doubt______ one day the medicine for AIDS will be made.

________ he still _________ in his office? —No. He __________ back home.

There will be trees and pollution in the future.