16. They spent more money, they had to work harder.
=> The more
17. People thought that the cover was made of iron.
=> The cover ……………………………………………………………………………
18. He went to London. He had lived there when he was a boy.
=> He went to London where …………………………………………………………..
19. Jane was absent from class because of her sickness.
=> Because Jane was ……………………………………………………………………
20. The package was too heavy for Peter to carry.
=> He package was so …………………………………………………………………..