1. Kể tên các tác dụng của dòng điện? Nêu đặc điểm và lấy ví dụ về mỗi tác dụng. 2. Vẽ mạch điện và chiều dòng điện trong mạch gồm nguồn điện 2 pin mắc nối tiếp, hai bóng đèn Đ1 và Đ2 mắc nối tiếp, một Ampe kế đo cường độ dòng điện trong mạch, một Vôn kế đo hiệu điện thế hai đầu Đ2, một công tắc đóng, dây dẫn. a) Tháo 1 bóng đèn thì bóng còn lại có sáng không? Vì sao? b) Vẽ thêm Đ3 và chiều dòng điện trong mạch sao cho khi công tắc đóng, Ampe kế chỉ cường độ dòng điện trong mạch, Vôn kế đo hiệu điện thế trong các trường hợp: + Hai đầu đèn Đ2 và đèn Đ3. + Hai đầu đèn Đ2, hai đầu đèn Đ3 + Hai đầu đèn Đ1, hai đầu đầu đèn Đ2

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Exercise 1: Put the verbs in the brackets in the correct tense 1. If I had a typewriter, I __________ (type) it myself. 2. If I __________ (know) his address, I'd give it to you. 3 .He __________ (look) a lot better if he shaved more often. 4. If you __________ (play) for lower stake,s you wouldn't lose so much. 5. If he worked more slowly, he __________ (not make) so many mistakes. 6. I shouldn't drink that wine if I __________ (be) you. 7. More tourists would come to this country if it __________ (have) a better climate. 8. If I were sent to prison, you __________ (visit) me? 9. If someone __________ (give) you a helicopter, what would you do with it? 10. I __________ (buy) shares in that company if I had some money. 11. If he __________ (clean) his windscreen, he'd be able to see where he was going. 12. If you drove your car into the river, you __________ (be) able to get out? 13. If you __________ (not belong) to a union, you couldn't get a job. 14. If I __________ (win) a big prize in a lottery, I'd give up my job. 15. What you __________ (do) if you found a burglar in your house? 16. I could tell you what this means if I __________ (know) Greek. 17. If everybody __________ (give) Ј1, we would have enough. 18. He might get fat if he __________ (stop) smoking. 19. If he knew that it was dangerous, he __________ (not come). 20. If you__________ (see) someone drowning, what would you do? 21. I __________ (be) ruined if I bought her everything she asked for. 22. If you slept under a mosquito net, you __________ (not be) bitten so often. 23. I could get a job easily if I __________ (have) a degree. 24. If she__________ (do) her hair differently, she might look quite nice. 25. If we had more rain, our crops __________ (grow) faster. 26. The whole machine would fall to pieces if you __________ (remove) that screw 27. I __________ (keep) a horse if I could afford it. ' 28. I'd go and see him more often if he __________ (live) on a bus route. 29. If they __________ (ban) the sale of alcohol at football matches there might be less violence. 30. I __________ (offer) to help if I thought I'd be any use. Exercise 2: Using the given information, make conditional sentences with IF 1. They are poor, so they can’t help us. → If they ................................................................................................... 2. He doesn’t do his homework. He is always punished. → If he ..................................................................................................... 3. He doesn’t have enough time. He can’t help me. → If he ...................................................................................................... 4. She doesn’t take any exercise, so she is overweight. → If she .................................................................................................... 5. He doesn’t have a bicycle, so he always goes to class late. → He wouldn’t ........................................................................................... 6. I am bad at English, so I can’t do homework. → I could ................................................................................................... 7. He doesn’t practise speaking French, so he doesn’t speak it fluently. → If he ....................................................................................................... 8. The meeting can be cancelled because it snows heavily. → If it ..................................................................................................... 9. We don’t go because it will rain. → If it ........................................................................................................ 10. John is fat because he eats so many chips. → If John .................................................................................................. (giúp mình với ạ)