2) Vẽ sơ đồ mạch điện gồm: dây dẫn, công tắc mở, 1 bóng đèn, 1 nguồn điện. 3) Kể tên các tác dụng của dòng điện. Bóng đèn dây tóc hoạt động dựa trên những tác dụng nào của dòng điện? Vì sao không nên sử dụng bóng đèn dây tóc để thắp sáng lớp học? CẢM ƠN BẠN NHIỀU :))

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VERB FORMS / TENSES 1. If he (go) _______________ to the party last night, he (meet) _____________ her. 2. He would like (have) ________ a cup of coffee. 3. They feel like (work) __________ together. 4. We are happy (meet) __________ you again. 5. Let’s (have) __________ dinner out. 6. I (live) …………………… in Hue before I (come) …………………here 7. Would you like (sit) __________down. 8. If I were you, I (buy) ___________ that house. 9. I would tell you if I (know) __________. 10. What about (go) __________ out tonight? 11. I (buy) ________________ this house after my son (be) ___________ born. 12. She would have visited Hue if she (have) _____________ enough money. 13. Bring him another if he (not/like)………………………….. this one. 14. I (read) …………………………. this book before. 15. She (be)………………….. angry if she (hear)……………… this tomorrow. 16. Unless you are more careful, you (have)……………………… an accident. 17. If you (like)…………………, I (get)………………………………….. you a job in this company. 18. If grandmother (be)…………………… 5 years younger, she (play)…………… some games. 19. If he sun (stop)…………………. shinning, there (be)……………………… no light on earth 20. If I (be)…………………… a millionaire, I (live)……………………………. on Mars. 21. If I (know)…………….. that you were ill, I (go)…………………. to see you. 22. If she'd had enough money, she (buy)…….…………. a car. 23. I (buy)………………… a car if you lend me some money. 24. We (watch) ………………….. an interesting film last night. 25. I (see)………………… him if I (go)……………….. to the party last night. 26. We could have gone out if the weather (not be)……………….. so bad. 27. If the book (not be )………………… expensive, I'll buy it. 28. You would be very surprised if he (return)……………………… 29. I'll go out if it (not rain)…………………………. 30. They wouldn't come to the party if you (not invite) ……………………….them. ------------------------------------ 1. I would be able to lead the way if you (lend)...............................me your map. 2. If Hoa had had a rain coat, she (not/ have)...................................a cold. 3. What (happen).................................if there were no plants on earth? 4. If we (be).................aware enough of the importance of the environment, we will respect it 5. What would happen if the temperature of the earth (be)..........................warmer? 6. He wouldn't have had an accident if he(drive)...................................more carefully. 7. If Linda (have).......................................her the money, Sophie wouldn't have bought the stereo system. 8. If you (sleep)........................................better last night, you wouldn't have been so tired now. 9. Peter would have caught the train if he(get)...........................to the station on time. 10. If anyone (ring)................................. for me, please tell them I'll be back in the office at 4 o'clock. 11. We'll have the party in the garden if the weather (be)........................... good. 12. If I (be) ............................ you, I wouldn't buy that coat. 13. If someone tried to blackmail me I (tell)..........................the police. 14. If I pass the exam, I ......................... to medical college (go) 15. If he................................medicine, he will be a doctor. (study) 16. His car .............................a lot safer if he bought some new tires (be)

1. He doesn’t have the money and he cannot afford a new car. If………………………………………………………………………………………….. 2. Susan felt sick because she ate 4 cream cakes. If…………………………………….…………………………………………………….. 3. We didn’t know your phone number, so we could not contact you. If…………………………………….……………………………………………………….. 4. The price of petrol was raised last month, so car sales have dropped again. If…………………………………………………………………………………………….. 5. I cannot go to the beach with you this weekend because I have a date with my old classmates. If……………………………………………………………………………………………. 6. She didn’t hurry, so she missed the train. If………………………………………….……………………………………………….. 7. I never got very lonely because I have lots of good friends. If…………………………………………………………………………………………….. 8. We didn’t go on holiday because we didn’t have enough time. If…………………………………………………………………………………………….. 9. We got lost because we didn’t a map. If…………………………………………………………………………………………….. 10. The match can be cancelled because it rains heavily. If…………………………………………………………………………………………….. 11. He lost all his money because he wasn’t careful. If………………………………………………………………………………………….. 12. Because Simon doesn’t live near his mother, he can’t visit her often. If……………………………………………………………………………………………. 13. Without this treatment, the patient would die  If ________________________________________________________________ 14. Without the air, we would die. If ________________________________________________________________________ 15. I didn’t watch TV last night because I was busy. __________________________________________________________________________ 16. I don’t know the answer, so I can’t tell you. If _________________________________________________________________ 17. We get lost because we don’t have a map. __________________________________________________________________________ 18. I couldn’t write to Alice because I didn’t know her address. __________________________________________________________________________ 19. He failed the exam because he watched TV too much. __________________________________________________________________________ 20. Without your help, I couldn’t buy the house. __________________________________________________________________________ 21. He didn’t answer the phone because he was taking a bath. __________________________________________________________________________