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МатематикаВопрос:
42.2 Write questions using the passive. Some are present and some are past. 1 Ask about glass. (how / make?) How is glass made? 2 Ask about television. (when / invent?) When __________ 3 Ask about mountains. (how / form?) __________ 4 Ask about DNA. (when / discover?) __________ 5 Ask about silver. (what / use for?) __________
Ответ:
2. When was television invented? (Когда было изобретено телевидение?)
3. How are mountains formed? (Как формируются горы?)
4. When was DNA discovered? (Когда была открыта ДНК?)
5. What is silver used for? (Для чего используется серебро?)
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- 42.1 Complete the sentences. Use these verbs in the correct form, present or past: 1 Many accidents __________ by careless driving. 2 Cheese __________ from milk. 3 The roof of the building __________ in a storm a few days ago. 4 A cinema is a place where films __________. 5 You __________ to the party. Why didn't you go? 6 This plant is very rare. It __________ in very few places. 7 Although we were driving fast, we __________ by a lot of other cars. 8 In the US, elections for president __________ every four years. 9 There was an accident last night, but fortunately nobody __________. 10 You can't see the house from the road. It __________ by trees. 11 I never received the letter. It __________ to the wrong address. 12 The company I work for __________ by a much larger company.
- 42.3 Put the verb into the correct form, present or past, active or passive. 1 a Two hundred people __________ (employ) by the company. b The company __________ (employ) 200 people. 2 a Water __________ (cover) most of the earth's surface. b How much of the earth's surface __________ (cover) by water? 3 a While I was on holiday, my camera __________ (steal) from my hotel room. b While I was on holiday, my camera __________ (disappear) from my hotel room. 4 a Robert's parents __________ (die) when he was very young. b Robert and his sister __________ (bring up) by their grandparents. 5 a The boat hit a rock and __________ (sink) quickly. b Fortunately everybody __________ (rescue). 6 a Bill __________ (fire) from his job. He wasn't very good at it. b Sue __________ (resign) from her job because she didn't enjoy it any more. 7 a It can be noisy living here, but it __________ (not / bother) me. b It can be noisy living here, but I __________ (not / bother) by it. 8 a Maria had an accident. She __________ (knock) off her bike. b Maria had an accident. She __________ (fall) off her bike. 9 a I haven't seen these flowers before. What __________ (they / call)? b I haven't seen these flowers before. What __________ (you / call) them?
