III Give correct form or tense of the verb.
15. She said angrily that she (not know)_________ anything
16. Do you think people (live)__________on the moon one day?
17. He tries (learn)________ at least 25 new words every day
18. We saw Harry (wait)________ for the bus at the bus stop downtown.
19. He (buy)__________you a palace if he was a millionaire
15. doesn't know
16. will live
17. to learn
18. waiting
19. would buy