by, with, or by means of
2. Current can be varied in a circuit __with__ a rheostat.
3. Earthquakes are usually caused __by__ the movement of the continental plates.
4. The age of the sample was determined __by means of__ the carbon 14 dating method.
5. Steel surfaces can be protected __with___ a thin coating of machine oil.
6. The colours of aurora borealis are generated _by__ the effect of solar particles on the various atmospheric gases.
7. The primitive cooling earth was darkened for centuries __by___ hot, dense clouds.
8. The direction of growth of a plant is controlled __by___ light (phototropism).
9. The body temperature of a higher mammal is regulated __by__ the hypothalamus.
1. Brenda asked Jimmy to turn off the TV because the film was boring.
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2. His mother tells him to wash his face and say GOOD MORNING to everybody.
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3. The teacher told Kate to do her homework again because there were a lot of mistakes.
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4. Mrs. Dawson told Barbara not to waste her time and finish studying.
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5. Her mother tells her to brush her teeth because they look very dirty.
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6. Kevin told his daughter to look out and added that there was a truck coming.
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7. Janet told David that book looked boring and asked him to give her another one.
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8. Mrs. Abbot told Jack that his hair was very long and she told him to go and have a haircut.
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9. Mrs. Denman told her son not to play in the sun because it was very hot.
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10. Mr. Newman asked Nicky not to make a lot of noise because he wanted to listen to the news.
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11. The mother asked not to turn it up and added she had a headache.
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12. Sue told Andy not to shout and added that she wasn't deaf.
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13. Terry told Ashley not to speak German but to speak English. He added they couldn't understand her.
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14. Mrs. Newton asked the children to be quiet because the baby was sleeping.
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15. John asks me to move aside because he can’t watch television.
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16. Mark said he wanted to buy a new car because theirs was very old and spent a lot of petrol.
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17. Tom asked Carol if he could borrow her dictionary because his was at home.
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18. Her mother tells her to go to the bathroom and wash her hands because they are very dirty.
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19. Sandy asked Danny if his mother worked and he added he saw her on the bus every day.
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20. Tom told Jane he was bored and asked her if they could go to the cinema.
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21. Sam told Kate he was broke and asked if she could lend him some money.
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22. Mother told her son that his friends were playing in the garden and asked if he wanted to play with them.
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23. Jim asked his son when he would go to school because he was very late.
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24. Tony asked his mother what she had cooked and added that he felt very hungry.
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25. Mrs. Dawson asked John why he didn't wash his car because it looked very dirty.
