4. Here is a story. Make it sound better by putting pronouns instead of nouns where you think necessary.

About Sir Isaac Newton
One of the greatest Englishmen who ever lived was Sir Isaac Newton. No man of that time or of almost any other time had a greater or wiser mind than Newton had, but Newton was very absent-minded about small matters when Newton was thinking about his work. One morning Newton got up very early because Newton was working on a very difficult problem. New- ton was thinking about the problem so deeply that Newton would not leave the problem to go to breakfast. But his housekeeper thought Newton needed food so the housekeeper sent Mary, a servant, to his study with a pan of water and an egg. The housekeeper told the servant to boil the egg and stay with Newton until Newton ate the egg. But Newton wanted to be alone, and Newton said, "Mary can leave the egg with Newton, and Newton will boil the egg." The servant put the egg on the table by the side of Newton's watch and the servant said, "Sir Isaac Newton must boil the egg for four minutes and then the egg will be ready," then the servant left the room. The servant was afraid, however, that Newton might forget to boil the egg, so Mary returned about an hour later and found Newton standing by the fire- place. Newton had put the watch in the saucepan and was boiling the watch. Newton was holding the egg in his hand, quite unaware of the mis- take that Newton was making.