16. It's not _______good idea to play computer games for more than two hours without _______break.
A. the; the B. a; the C. the; a D. a; a
17. The poor girl can go to high school now, The charity has paid for her _______.
A. operation B. vacation C. education D. invention
18. For everyone's safety, drivers _______always remember not to drive after drinking.
A. could B. should C. might D. would
19. When I was a child, my dad _______me to the park nearby to watch birds.
A. used to take B. is used to taking C. is used to bring D. used to bring
20. The story was written in _______easy English _______even beginners could understand it.
A. so; that B. such; that C. too; to