用所给动词的适当形式填空。
l. Mr. Brown was disappointed to see the washing machine he had_____ (repair)went wrong again.
2. Children's being addicted to the Internet gets their parents _____ (worry).
3. Many feared that Columbus would fall off the edge of the earth,____ (believe) to be fiat.
4. _____ (take)his health into consideration, he has to be sent to hospital at once.
5. Mr. Smith, ____ ( tire ) of the ___ (bore) speech, started to read a novel.
6. The girl let out a _____ (frighten) voice at the sight of the snake.
7. His____ (frighten) voice scared the boys away.
8. The man is hard to ____ (deal with).
9.It is no use____ (argue) with him.