C
What do you do when you feel unhappy? Do you listen to music? Do you talk to a friend? There are two ways to make you happy.
You should try going outside if it's sunny. Doctors know that how much sunlight we get can change how we feel. Scientists learnt this by asking people who live in different parts of the world. In the far north, in Alaska or Finland, for example, the days are very short in the winter. In the south, where there are more daylight hours, fewer people say they are unhappy in the winter. The reason has to do with the sunlight these people get each day. Sunlight changes the chemical (化学物质) in our bodies, and these chemicals can change the way we feel. A few hours of strong sunlight can help your body make the chemicals that make us feel happy.
Another way to feel happier is to get some exercise. Just like sunlight, regular exercise helps our bodies make the chemicals, which makes us feel happier. Also, exercise helps people sleep better. Not getting enough sleep often makes people feel unhappy. Exercise also helps you lower stress. When you are angry or sad about something, exercise is a good way to get those bad feelings out of you.
In fact, we can still find many other ways to make ourselves not sad.
9. Why do people in the far north feel unhappy more often than people in the south? ()
A. Because they can't go outside.
B. Because they get less sunlight.
C. Because the weather is too cold.
D. Because the summer is too short.
10. How can sunlight change the way you feel? ()
A. On a sunny day, you can play outside.
B. Sunlight makes you less tired.
C. Sunlight increases your body temperature.
D. Sunlight helps your body make the chemicals.
11. How is the text organized? (① = Paragraph 1, ② = Paragraph 2, …) ()

12. What is the best title for this text? ()
A. Why Is Sunlight Good for You?
B. How Can Exercise Help You?
C. How Can You Feel Happier?
D. Why Should You Exercise More?

9. B 10. D 11. A 12. C