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CHECK. Work with o partner. Discuss answers to the questions according to
the information in the article. Then discuss your answers as a class.

1. What is one advantage of cooking food?
2. Why doesn’t a raw-food diet support brain growth?
3. Why do some scientists doubt the cooking theory?

DISCOVER. Complete the exercises to learn about the grammar in this lesson.

Find these sentences in the article from exercise 1. Write the missing words.

Research shows_____ that our brains grew most rapidly about
1.8 millions years ago.

Researchers are trying to explain_________ this happened.
Other scientists wonder ____ the cooking theory is right.

Some of them aren't sure SSS épecople we re cookiingl
over one million years ago.
What follows each word or phrase that you wrote in exercise A?

b. a verb + object
c.a subject + verb
a. an adjective + verb

<4 sReplica of a Stone Age
fire since prehistoric
house. People have
been cooking with

NU Ctome Oot e
Bolzano, Italy)

UNIT 14 LESSON 1 393