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1. What do woolly mammoths and saber-toothed cats have in common?
2. What is happening to more animals every year?
3. How has the ancient woolly mammoth’s habitat changed?
4. What are some dangers that revived species might experience today?
DISCOVER. Complete the exercises fo learn about the grammar in this lesson.
Read each sentence from the article in exercise 1. Then read the statements below. Write
T for frue or F for false.
Scientists wish they could change the situation.
___— Scientists are not sure that they can change the situation.
If large numbers of mammoths were brought back, they could improve the land.
_____ It is certain that large numbers of mammoths will be brought back.
If researchers could study a large variety of revived animals, they would lear a lot.
_____ Researchers can’t study a large variety of revived animals now.
Even if scientists had more answers, people would continue to debate the issues.
___— Scientists don’t have all of the answers now.
Look at sentences 2-4 in exercise A again. Circle T for frue or F for false.
F
T
1. In sentences 2 and 4, the simple past is used in the if clause.
2. In sentences 2-4, the simple past is used in the main clause.
3. In sentence 2, the verb form in the if clause describes an action in the past.
4. In sentences 2—4, the sentences are about real situations.
& Yamal-Peninsula,
Siberia, Russia
2
UNIT 13 LESSON 367
