We can make a fire（火） ______ the room warm.

They preferred ________ in bed rather than ________ horses.

________of the land in that district________ covered with trees and grass．

Shall we ________John to help us with the project?— I don’t think it’s a good idea. He has too much work to do.

What bad weather!—Yes. If it _______raining, the fields will be covered with water soon.