1. He spent last summer in the country.
2. He didn't spend last summer in the country.
3. Did he spend last summer in the country?
4. Where did he spend last summer?
5. She helped mother yesterday.
6. She did not help mother yesterday.
7. Did she help mother yesterday?
8. How did she help mother yesterday?
9. Kate cooks dinner every day.
10. Kate will cook dinner tomorrow.
11. Kate is cooking dinner now.
12. Kate cooked dinner yesterday.
13. I don't eat ice-cream every day.
14. I am not eating ice-cream now.
15. I will not eat ice-cream tomorrow.
16. I did not eat ice-cream yesterday.
17. Do you go to school every day?
18. Are you going to school now?
19. Will you go to the South next summer?
20. You went abroad last summer.
21.What does your brother do every day?
22. What is your brother doing now?
23. What will your brother do tomorrow?
24. What did your brother do yesterday?
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Another important invention which has contributed greatly to our modern knowledge was writing. at first, writing was a special form of drawing, and was usually very simple. but gradually these primitive drawings turned into letters. from the counting of days and months, man went on to count cattle and sheep and the earliest forms of arithmetic appeared. the greeks were the first people to use writing to record language as spoken by contemporary men; and their works are still widely read today, for information and for pleasure. переведите