—What is your best friend like?.—He is a helpful student. He often helps the teachers _____ papers.
—Which is the biggest number of the four? — .
His father and mother often argue _______ what TV programmes _________.
---Can I get you a cup of coffee?---_____________.
---It was ___________ who helped us out of danger. ---What brave and helpful children! We should learn from them.
--- Do you mind telling us something about this area? --- Not at all. ________ of the land in this area _________ covered with trees and grass.