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2 CHECK. Answer the questions about the article in exercise 1. Write complete sentences.

1. What did late twentieth-century researchers find out about the teenage brain?

2. What are two characteristics that teens from all cultures share?

3. According to the graph, at what ages do teenagers take the most risks?

4. What is the positive side of teenage risk taking?

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

A_ Read the sentences from the the article in exercise 1. If there is an article (a/an or the) before
the underlined noun, circle if.

1. Ask almost any parent of@teenager .. .

2. Nobody had a good explanation until the late twentieth century.

3. The brain scans show that the brain develops slowly through childhood and adolescence.

4. ...researchers have begun to view the teenage brain and teen behavior in a more positive way.

5. ...the search for excitement and risk prepares teens to leave the safety of their homes and
move out into the world.

B Check W) the statements that are true based on your answers in exercise A.

____ 1. A oran is used before a plural count noun.

_____2. The is used before a singular count noun.

—____ 3. The is used before a plural count noun.

—____4. The is used before a non-count noun.

—___5. No article is used before a singular count noun.

____ 6. No article is used before a non-count noun.

UNIT5 LESSON2 125
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