Tại Sao phải đặt hiệu điện thế trong nhà là 220v mà ko đặt hiệu điện thế là 40v

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1. International school in Ho Chi Minh City is the ______ school in Vietnam with high-tech facilities. A. oldest B. youngest C. most historic D. most modern 2. My family had a lot of ______in Hoi An and it was an exciting trip. A. fun B. funny C. enjoy D. enjoys 3. That city is most famous______ its fashion shops. A. to B. with C. for D. of 4. Nha Trang has an ________atmosphere of young, _________ city. A. exciting – growing B. exciting – grown C. excited – grow D. excited – growing 5. Do you have __________ in Da Lat during your holiday? A. time B. good time C. a good time D. good a time 6. I have been to Nha Trang _________. How about you? A. one B. two C. two times D. twice 7. Britain’s most common __________ activities are watching TV and films and listening to the radio. A. free B. leisure C. good D. popular 8. Big Ben is the most famous ___________ in England. A. tower B. waterfall C. city D. river II. Put the verbs in the brackets in the Present Perfect tense. 9. I (have)_________ this bike since I was a teenager and I still use it. 10. The weather (be)_________ quite good since Christmas. 11. I (study)_________ very hard for this examination. 12. He (play)_________ for the football club for several years, but it’s time to leave it now. 13. Mike and his brother (learn)_________ English for three years. 14. Mr. Brown (play)_________ chess since eight o’clock. 15. It (not rain)_________ since last week. 16. We (not see)_________ our new teacher yet 17. My aunt (work)_________ in this hospital for eleven years. 18. She (see)_________ the film before. 19. Hoa (walk)_________ in the rain many times. She loves it! 20. He (never meet)_________ her before.