Question

Поставьте глагол в правильную форму .
1. In early times people (to begin) domesticating wild animals .
2. I think the farmer (to increase) the yields of crops next year.
3.The scientists from our laboratory ( to present ) interesting reports at the conference recently.
4. Last year the farmers (not to rely ) on feeds from pastures and ( to grow ) additional crops for their livestock .
5. The cow ( convert ) large quantities of different grasses into milk which ( to be ) a valuable product .
6. As our agronomist (to recommend ) we ( to spread ) manure on this field now.
7. People ( to keep ) domesticated animals either in barns or on pastures .
8. The production of dairy product constantly (to increase ) in Russia at present.
9. What animals (to use ) people as draft animals in the 18 th century ?
10. For many centures people in Africa (to breed ) camels but even now a white camel (to be ) an exotic animals .
11. Last week the farmers (to keep ) swine on pastures .
12. Poultry also ( to convert ) feed efficiently into protein and (to provide ) people with meat and eggs .
13. If any species in the food chain ( to disappear ) ,there ( to be ) a disbalance in the whole ecosystem .
14. As soon as the environment of a species or a population ( to develop ) in an unfavourable way ,it ( to cause ) an ecological crisis.
15. If ecologists ( not / to make ) soil and water analyses,they ( not / to be able ) to estimate the environmental polution.

Answer 1

Відповідь:

1. began

2. will increase

3. have presented

4. didn't rely, grew

5. converts, are

6. recommends, to spread

7. kept

8. is increasing

9. used

10. had been breeding, are

11. kept

12. converts, provides

13. disappears, are

14. develops, will cause

15. didn't make, would not be able