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химические явления происходят
- Предмет:
  Химия
- Автор:
  gilda
- 5 лет назад

Ответы 1

При изменении мельчайших частиц вещества , происходит превращение одних веществ в другие .
- Автор:
  cassandra
- 5 лет назад
- 0
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Упражнение 4. Перепишите предложения, используя Present Perfect or the Past Simple.
ПРИМЕР. I am writing a letter to my cousin, (already, yesterday).
• I have already written a letter to my cousin.
• I wrote a letter to my cousin yesterday.
1. Mother is bringing our tea. (a few minutes ago; not yet)
2. The bell is ringing. (just; some minutes ago)
3. He is going to London in a few days. (already; last week)
4. The boys are playing football in the yard now. (yesterday; many times)
5. Anna is reading a new novel by Chekhov. (this month; last year)
6. Students are cleaning their classrooms. (already; last Saturday)
7. The teacher is explaining a new rule. (just, at the last lesson)
8. Ann is doing the flat. (just; on Friday)
9. They are discussing this plan again. (many times; a few days ago)
10. Granny is making a birthday cake. (just; yesterday)
11. The birds are flying to the South. (already; at the end of August)
12. The train is coming. (just; an hour ago)
13. Who is your friend speaking to? (yesterday, just)
14. We are writing the words from the text. (already, at the last lesson)

* * *

Упражнение 5. Перепишите предложения, используя Present Perfect or the Past Simple.
1. This scientist … (write) a lot of books. He … (write) his first one in 2001.
2. … you … (ever see) a film as good as that?
3. I … (never travel) to the USA. What about you? When … (you go) there?
4. He … (live) in Manchester for eight years, and he wants to move to another place.
5. She … (live) in Manchester for two years, and then in 2003 she … (move) to London.
6. We … (meet) Jane and Alan two years ago. How long … (you know) them?
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