1. He was ______ in demonstrating his invention. (success)

2. Alexander Graham Bell _______ (success) demonstrated his _____ (invent) in the public.

3. The _____ of any plan depends largely on its manager. (succeed)

4. Children usually develop ______ in the second year of life. (speak)

5. I have to do my ______ before watching television. (work)

6. Thanks for the ______ to your birthday party. (invite)

7. This old man is _____ in one ear. (deafen)

8. There was an ______ of paintings at the Art Gallery. (exhibit)

9. She went ______ to answer the phone in the living room. (stairs)

10. Ho Chi Minh City is an important ______ center. (commerce)

11. They get two ______ of mail a day. (deliver)

12. Do you have any _____ about train times? (inform)

13. The world changed rapidly after the _______ of the telephone. (invent)

14. There are ______ arguments against the building of a new stadium in the city center. (count)

15. Alexander Graham Bell was born in _________ (Scottish).

16. The ______ future of the company looks very promising. (commerce)

17. There was still no _____ on what to do next. (agree)

18. My brother is working as an _______ manager. (assist)

19. They made all the _______ for the party. (arrange)

20. Your order is ready for _______. (deliver)