Фрагмент из книги.
The language chart introduces simple present and present continuous tenses.
The simple present tense is used to talk about states (Polar bears live in the Arctic.) or repeated actions (Polar bears hunt seals.) The present continuous tense uses be + -ing to explain that an event is in progress at the time of speaking. It is often used to describe changing situations (Our planet's temperature is rising.).
Vultures in danger.
In the early 1990s. something began to happen to India’s vultures Once, tens of millions of these birds filled the skies. Then, suddenly, they began to die out In less than a decade, the three most common Indian vulture species declined by more than 95 percent The Oriental white-backed vulture population—once the most common large bird of prey in the world—fell by an incredible 99 9 percent It was one of the fastest population collapses of any bird species in history.
Scientists eventually traced the cause of the decline to a pain-killing drug called diclofenac, which was used to treat sick livestock Although safe for cows, it is deadly to vultures. Any vulture feeding on the flesh of a cow treated with diclofenac soon becomes ill Millions of vultures died as a result To stop the decline, India's government banned the drug's use on animals in 2006 Today, the country’s vulture decline is slowing.
CONTENTS.
Scope and Sequence.
Pacing Guide.
Course Overview.
1 Protectors.
2 Family Connections.
3 Global Stories.
Presentation 1.
4 Music.
5 Good Design.
6 Inspiration.
Presentation 2.
7 Ethical Choices.
8 Better Cities.
9 Giving.
Presentation 3.
10 Mind and Machine.
11 Nature.
12 Discovery.
Presentation 4.
Workbook Answer Key.
Audio and Video Scripts.
Unit Quizzes.
Unit Quizzes Answer Key.
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Теги: учебник по английскому языку :: английский язык :: Sheils
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