— What is Grandma cooking in the kitchen? — Fish, I guess. How nice it _______!
He’s been to the Great Wall, ?
We believe scientists will a way to solve the problem of air pollution.
You had better _____ home at once . Don’t keep your mother _____ .
Remember ______ the book in time when you have finished _____ it .
It will about half an hour to get to the zoo by bus.