______is known to us, he is the top student of our class.
— Would you please give an example to show how useful a computer is? — Sure. __________ people get __________ information from it every day.
Don’t ___that all these who get good grades at school will be surely successful in the future.
Mary, you can’t imagine what great difficulty I’ve had _____ him with the project.
The teacher demanded that he __________ his homework at once.
The old man had a son and two daughters, _____treated her well, ____made her sad.