Choose the correct answer for each following questions.
1. My parents ____ us many times.
2. How long ____ your best friend?
3. YouTube ____ to become the world most popular video-sharing website since 2005.
4. “Would you like a coffee?" - “No thanks. ____ one.”
5. Scientists have invented artificially intelligent computer systems ____ of answering questions posed in natural language.
6. What do you think is the most useful invention in medicine?
7. In order to be taken away and used everywhere, modern inventions have a tendency to be small and ................
8. Choose the word which has a different stress pattern from that of the others.
9. Choose the word which has a different stress pattern from that of the others.
10. More than 40 patterns on silicon surfaces .................. with that paintbrush so far.
11. Oue hen ................. for nearly 10 days so we have no eggs in our fridge now.
12. The Jet engine has had ...................... on life since the twentieth century
13. Do you know how this machine work ? – All you do is just .............. this button and it starts automatically.
14. You can’t use the washing machine today. It’s ....................
15. Modern home entertainment system and other ................ are changing everyone ‘s life.
16. ................... the technological revolution is opening up a whole new world, many people are worried by it.
17. Most computers have enough memory to store .................. of information.
18. My phone is out of order, .......................... is a nuisance.
19. The optic fiber was a major ................... in the field of telecommunication.
20. She left a message ....................... I could know where to find her
