GRAMMAR & VOCABULARY

Choose the correct answer: a, b, or c

1. How some pizza?
A like B many C about

2. Brendan has got a brother.
A double B twice C twin
3. It's my birthday 5th August.
A at B in C on

4. We go on a school once a year
A travel B journey C trip
5. The is in the kitchen.
A bathtub B fridge C bookcase
6. They often camping at the weekend
A do B play C go
7. There is food in the cupboard.
A any B a C some
8. Chess and backgammon are both games
A table B bored C board
9. June is the month of the year.
A sixth B six C sixteen
10. We were afraid to swim in the river
A polluted B deserted C clean
11. They usually go to school foot.
A in B on C by
12. Did they home early last night?
A arrived B arrives C arrive
13. I can drive a car but I fly a plane.
A don't know B can't C can to
14. I at the door but no one answered.
A knocked B hit C rang
15. Wear your coat, scarf and gloves. It's cold.
A freezing B boiling C pouring
16. We met ten years
A gone B ago C past
17. Watch! There's a motorbike coming.
A up B out C over
18. Be quiet! You make noise.
A mustn't B must C can
19. Do you your teeth every day?
A wash B brush C do
20. I'm not to go to the cinema tonight.
A will B would C going
21. Does he history at school?
A teaches b teach C teaching
22. We had a nice picnic in the
A restaurant B stadium C park
23. John is very worried his son.
A at B about C of
24. A lion is than an elephant.
A smaller B smallest C small
25. Frank his homework at the moment.
A is making B is doing C does
26. Jim does bodybuilding at the sports
A place B room C centre
27. On Christmas Day, we all gifts.
A transfer B exchange C change
28. What are the of the game?
A laws B rules C guides
29. Let's watch the firework
A display B show C programme
30. You're on holiday. You wake up early.
A have to B needn't C mustn't

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Ответ:

AntosciucAndreea

10.02.2023 16:47

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.

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