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tin01682347819
2 năm trước
Một phòng học hình chữ nhật, chiều dài 10m, chiều rộng bằng 3/5 chiều dài. Người ta cần lát nền căn phòng bằng những viên gạch hình vuông cạnh dài 20cm. Tính xem dùng tất cả bao nhiêu viên gạch để lát nền căn phòng ( mạch vữa không đáng kể ).
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EXERCISE: Put the verbs in brackets in the correct tense 1. The war (break) ___________ out three years ago. 2. I saw a bad accident while I (wait) __________ for you on this corner. 3. She (stay) ___________ with her sister at the moment until she finds somewhere to live. 4. The manager just (close) __________ the store the moment before I (arrive) ___________. 5. If you call her at 6, she (practice) ____________ the piano then. 6. When we (see) ___________ Mr. Taylor tomorrow, I (remind) ____________ him of that. 7. Up to the present, George (do) ____________ good work in this class. 8. My parents (live) ___________ in London. They (be) ____________ there for 20 years. 9. He (sit) _____________ in the garden when the house (fall) ___________ down. 10. At three o’clock this morning, Mary (study) _________ English. 11. They (build) ___________ that bridge when I was here last year. They (not finish) ___________ it yet. 12. He certainly (not, do) _____________ all his homework by 10 tonight. 13. Don’t make noise. My mother (talk) ___________ with her friends. 14. Miss Helen (help) ___________ you as soon as she (finish) _____________ that letter tomorrow. 15. He (do) ___________ his homework before he went to the cinema. 16. The moon (go) ___________ round the earth. 17. I feel terrible. I think I (be) ______________ sick. 18. He (leave) _____________ London 2 years ago and I (not/ see) ____________ him since then. 19. Where ___________ you (live) __________? – In a flat, near the university. 20. When he (return) ____________, I (give) ______________ him the key. 21. I (come) _____________ and (see) ___________ you before I leave here. 22. Whenever I have a problem, I (give) _____________ you a ring. 23. After she had been at the party, her heart (be) __________ full of strange emotion. 24. ___________ you (think) ____________ that he (recognize) __________________ me? 25. When I (be) ___________ a child, I (spend) _____________hours playing with a tin box. 26. ____________ you (have) _________ time to help me tomorrow? 27. He smiled at me in a friendly way when he (see) _____________ me. 28. I (remember) _____________ this day all my life. 29. Where you (be) __________ all this morning? It’s nearly midday now. 30. What you (do) ___________ when you grow up, my boy? 31. We’ll go out when the rain (stop) _____________. 32. Where are you? I am upstairs. I (have) __________ a bath. 33. I (listen) _____________ to the radio when you rang the bell. 34. I (know) _____________ the result in a week. 35. She was late because she (have) ______ an accident.

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