Употребите вопросительную и отрицательную формы следующих предложений. 1. i am a teacher1 . 2. my brother is an artist. 3. she is a programmer. 4. he is a reporter. 5. we are managers. 6. i am eager to see the world. 7. life is hectic1 . 8. the shops are closed today. 9. kate is at home now. 10. i am a bus driver. 11. my keys are lost. 12. my children are i very well. 13. our students are very good. 14. my job is well-paid. 15. the traffic is heavy today. 16. they are japanese. 17. boris is in spain. 18. english is difficult. 19. chinese is easy. 20. computers are very useful. 21. robert is a friendly boy. 22. my friends are always helpful.

1) Am I a teacher?  I am not a teacher.
2) Is my brother an artist?  My brother is not an artist.
3) Is she a programmer?  She is not a programmer.
4) Is he a reporter?  He is not a reporter.
5) Are we managers?  We are not managers.
6) Am I eager to see the world?  I am not eager to see the world.
7) Is life hectic?  Life is not hectic.
8)  Are the shops closed today?  The shops are not closed today.
9) Is Kate at home now?  Kate is not at home now.
10) Am I a bus driver?  I am not a bus driver.
11) Are my keys lost?  My keys are not lost.
12) Are your children well?  My children are not very well.
13) Are our students very good?  Our students are not very good.
14) Is your job well-paid?  My job is not well-paid.
15) Is the traffic heavy today? The traffic is not heavy today.
16) Are they Japanese? They are not Japanese.
17) Is Boris in Spain?  Boris is not in Spain.
18) Is English difficult?  English is not difficult.
19) Is Chinese easy?  Chinese is not easy.
20) Are computers (very) useful?  Computers are not very useful.
21) Is Robert a friendly boy?  Robert is not a friendly boy.
22) Are your friends always helpful?  My friends are not always helpful.

что нужно делать

Объяснение:

Здравствуй! Добро на мой привет всем! Каждый

блог @sweetlife !! кто хочет путешествовать

наслаждайтесь выпечкой! Я не могу зажечь, добро в мой

представьте мою жизнь блог @traveLight. я

без вкусных пирожков уже посетили 56

и торты. Я предпочитаю страны и планирую

посетите еще два

мало времени на

страны скоро. От

готовлю, так что подписывайтесь на название моего блога,

в мой блог, и вы увидите, что я

научитесь готовить быстро. предпочитаю путешествовать с

Ненавижу есть только высокую ручную кладь. я

калорийная еда, так что моя

ненавижу множество

рецепты содержат только

здоровый и низкий

одежду. Мне нравится ходить

калорийность ингредиентов. Если делать покупки в новом

вы хотите найти страну и купить

конкретный рецепт, используйте там одежду. Эта

специальные хэштеги: когда я планирую посетить

#cakesandpiesyummy, Камбоджа. Если ты хочешь

# шоколадный мир и путешествовать со мной,

#easybreakfast подписывайтесь и присоединяйтесь ко мне!  

перевод

So why did a change in climate 36,000 years ago drive the Siberian unicorn extinct, but not the woolly rhinoceros or the saiga?

To answer this question, our study took fossil bones from the Siberian unicorn, woolly rhino, and saiga, and looked at the nitrogen and carbon they contained — as differences in these elements reflect an animal's diet.

We found that before 36,000 years ago the saiga and the Siberian unicorn behaved very similarly, eating grass almost exclusively. After this point, the carbon and nitrogen in saiga bones showed a major dietary shift towards other plant types.

But shifting from a grass diet proved too difficult for the Siberian unicorn, with its special folded wear-resistant teeth and a low-slung head right at grass height.

Relatives such as the woolly rhino had always eaten a more balanced array of plants, and were much less impacted by a change in habitat.

Importantly, the change in climate that drove the Siberian unicorn extinct was actually much less pronounced than those which occurred during the Ice Age that followed. Or the changes that we will face in the near future.

The story of the Siberian unicorn is a timely reminder that even subtle changes in plant distributions can have devastating knock-on effects for large animal species.

Legends of the unicorn, or a beast with a single horn, have been around for millennia.

Some have argued that the horn of the rhino may have been the basis of myths about unicorns, although other animals - such as the tusked narwhal - are more likely contenders.

Follow Helen on Twitter