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тса2
тса2
06.04.2021 23:44 •  Английский язык

Replace the infinitives by the past indefinite, the present perfect or the present perfect continuous. 1.at last you (to open) the door. i (to ring) for an hour at least, i think. 2. here you are at last. i (to wait) for you for ten minutes. 3. the workers (to work) hard since tuesday. 4. the scientists (to carry out) a lot of experiments before they (to get) positive results. 5. it (not to rain) for a long time. 6. he (to work) at this project for a long time and(not to finish) it yet. 7. how long you (to know) her? i (to know) her for three years. 8. last night my friends and i (to decide) to stay in town for i lie summer. 9. they (to discover) diamonds in south africa in the 19th century. 10. the concept of the atom (not to exist) before 1804.

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Ответ:
kolasalnov5
kolasalnov5
11.06.2020 10:48

1.At last you  have opened the door. I have been  ringing  for an hour at least, I think. 2. Here you are at last. I have been  waiting  for you for ten minutes. 3. The workers have been  working  hard since Tuesday. 4. The scientists have carried out a lot of experiments before they get positive results. 5. It  has been  raining  for a long time. 6. He has been  working at this project for a long time and has not finished it yet. 7. How long have you been   knowing her? I have been knowing her for three years. 8. Last night my friends and I  decided to stay in town for I lie summer. 9. They  discovered diamonds in South Africa in the 19th century. 10. The concept of the atom has not to existed before 1804.

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