có bao nhiêu số tự nhiên có 3 chữ số??????

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Exercise 2: Choose the correct answer A, B, C or D. 4. It is twelve o'clock now. We..... to have lunch. A. want B. to want C. wanting D. are wanting 5. Do you like pop music ? -...... A. I would. B. Yes, a lot. C. No, I like it. D. Yes, we are. 6. Nam usually goes..... after school. A. to fishing B. to home C. fishing D. home back 7. -A: I am very tired. - B:...... A. Me too. B. For me the same. C. Also me. D. I also. 8. -A: "..... do the Hoang Ha buses run?" - B: "Every twenty minutes every day" A. How far B. What time C. How often D. How much 9. -A: "How big is Malaysia ?" - B: "It's much..... than Singapore." A. big B. smaller C. smallest D. bigger 10. What time..... on television? A. is the news B. are the news C. is news D. are news 11. My father is a good..... He works in a big restaurant. A. doctor B. worker C. cooker D. cook 12....... do you get there? – We walk, of course. A. Why B. What C. How by D. How 13. Excuse me, I'd like to...... this letter to the USA. A. send B. mail C. post D. All A,B,C 14. My head hurts. I have an awful....... A. toothache B. headache C. earache D. backache 15. There..... a lot of rain in summer in our country. A. are B. be C. aren't D. is 16. These are my notebooks, and those are..... A. she B. her C. hers D. your's Exercise 3: Find a mistake ( A,B,C or D) in each sentence. 17. What do Ba do when it is hot? A B C D 18.How many rooms there are in the new house? A B C D 19. I'm very thirty. I would like some apple juice. A B C D 20. We go to the library every Monday afternoons. A B C D Exercise 4: Read the text and fill in each blank with a suitable word. I have a very close friend. Her name is Mai. She is eleven years old and she is in (21)..... six. She can speak English very well. She has English (22)..... Tuesday, Thursday and Friday. She can also (23)……… the piano. In her room, there is a piano and some books. Every day she gets up at six. She has breakfast at six thirty and goes to school at a quarter to seven. She has her (24).....from seven o'clock to eleven thirty. Then she goes home and has (25)..... at twelve o'clock. It's three o'clock in the afternoon now and Nga is in her room. She is doing her homework.