Người ta xếp các hình lập phương nhỏ cạnh 1cm thành một hình lập phương lớn có cạnh 5 cm. Sau đó người ta sơn tất cả các mặt. Số hình lập phương nhỏ được sơn 2 mặt là: A. 24 hình B. 30 hình C. 36 hình D. 40 hình

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2.6 TAG QUESTIONS I . Add tag questions to the following 1.Your name is Thanh , ……………………………….. ? 2. Today is Sunday , ……………………………….. ? 3. John doesn’t agree with me about the plan , ……………………………….. ? 4. There’s a bus comimg , ……………………………….. ? 5. Everybody was saying their prayers in the church when I cane in, ………………….. ? 6. He makes a lot of mistakes in pronunciation , ……………………………….. ? 7. The traffic was heavy yesterday , ……………………………….. ? 8. Both men won’t surf the Internet for a chat any more , ……………………………….. ? 9. A lot of students don’t think studying grammar is interesting , ……………………….. ? 10. We haven’t done this homework yet , ……………………………….. ? 11. Jack’s enrolled on this course , ……………………………….. ? 12. Helen’s got fashionable clothes to wear on this important occasion , ………………? 13. The Smiths have got a computer , a CD player and two motorbikes , ……………… ? 14. The children have many computer games to play , ……………………………….. ? 15. Your brother has the chance to speak English outside the classroom , ……………… ? 16. David and Kate aren’t going to pay their school fees tomorrow , …………………….. ? 17. There weren’t any well- qualified teachers at this school , ………………………….. ? 18. This boy could use a computer at the age of 5 , ……………………………….. ? 19. MY father put an advertisement in the Times to sell his house , …………………….. ? 20. It is expensive for you to access the Internet , ……………………………….. ? 21. Jim really shouldn’t spend most of his time wandering on the Internet , ……………… ? 22. People don’t know which website is useful to them , ……………………………….. ? 23. Students have to wear uniforms in Vietnam , ……………………………….. ? 24. Email is good way for people to communicate , ……………………………….. ? 25. The garbage can be taken out everyday , ……………………………….. ? 26. We must send this message by email , ……………………………….. ? 27. You wouldn’t like another drink , ……………………………….. ? 28. Vinh would rather listen to English programs on the radio , ………………………….. ? 29. You had better not go out in the cold weather , ……………………………….. ? 30. Ba ought to join her family on a day trip to her hometown , ……………………….. ? 31. My sister might like writing email , ……………………………….. ? 32. You should attend the opening ceremony , ……………………………….. ? 33. You wouldn’t mind helping me with this , ……………………………….. ? 34. I needn’t say anything to you about it , ……………………………….. ? 35. Your aunt needs to grow rice on his farm , ……………………………….. ? 36. This is Mr. Johnson , ……………………………….. ? 37. That was Ann on the phone , ……………………………….. ? 38. Those weren’t your parents over there , ……………………………….. ? 39. These are your cases here , ……………………………….. ? 40. The Chinese invented paper in AD 105 , ……………………………….. ?