They were so far away that I couldn’t _____their faces clearly

I think you should go back to your ______plan, which is much more practical than the present one.

Students in the football class usually play ________ football when school is over.

______is known to us all, only the theory ______ onpractice can be practical.

The boy said ________ couldn’t he work outthe problem but his teacher didn’t know how to do it.