17. What do I think of your purple shoes? Well, they're certainly _______.
a. difference b. different c. differently d . differential
18. I read an interesting piece of _______ in the newspaper.
a. inform b. information c. informant d. informational
19. His parents _______ him awarded the winner's medal.
a. saw b. see c. to see d. seeing
20. Cigarette _______ kills thousands of people every year.
a. smokes b. smoke c. to smoke d. smoking