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Arestan
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Open the brackets using past simple или present perfect. 1. your friend (to return) yet? yes, he (to come) to moscow 5 days ago. 2. where is the secretary? i don’t know. she just (to go) out. 3. i (not to see) you for ages. yes. i (to fall) ill a week ago, but i already (to come) back to work. 4. you (to receive) an answer from them yet? no. we already (to send) them 2 letters, but they (not to answer) yet. when you (to send) the letters? last week. 5. how long you (to know) her? i (to know) her since we (to meet) on holiday. 6. you ever (to speak) to her about it? yes. i (to speak) to her 2 days ago. 7. will you give me your pen? i (to leave) my pen at home. take it. i already (to write) this exercise. 8. do you know that they (to leave)? yes. i (to be) at the station to see them off. 9. you (to read) this book? yes. i (to read) it when i (to be) at school.

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Ответы на вопрос:

srednenorm
srednenorm
4,5(55 оценок)
1returned came 2 gone 3 i not seen you age 4 5was knowing 7left 8 written 9road.road
terminator012
terminator012
4,6(30 оценок)
Hi! you do know about environmental problems? nowadays protection of the environment comes to the fore. consequences of insufficient attention to the problem can be catastrophic. it's not just about the well-being of humanity, and his survival. it is particularly disturbing that the environmental degradation may be irreversible.water pollution causes damage to human health and fish stocks. degradation of agricultural land has led to drought and soil erosion in many areas. hence the malnutrition, hunger, disease. air pollution is causing increasing harm to people's health. the massive destruction of forests affects climate and reduces biodiversity, gene pool. a serious health threat is the depletion of the ozone layer, which protects from harmful radiations of the sun. to catastrophic changes in the earth's climate is "the greenhouse effect", i.e. global warming as a result of growing emissions of carbon dioxide into the atmosphere. irrational use of mineral and living resources leads to their depletion, which again raises the problem of survival of mankind. finally, the accident on companies associated with radioactive and poisonous substances, not to mention the testing of nuclear weapons, causing massive damage to the health of people and nature. it is enough to recollect about the accident at chernobyl and fukushima .

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