1. (2021七下·吴兴期中) 阅读下面的材料，根据要求完成问题。

Do you like eating hamburgers and French fries? However, eating too much junk food is bad for you, particularly(尤其是) if you're between the ages of 13 and 19.

It seems that teenagers usually like junk food more than grown-ups. Amy Reichelt, a Canadian brain (大脑) scientist, studied the science behind this. She found that teenagers are more sensitive (敏感的) than any other age group to foods that have a lot of fat and sugar. Teenagers' brains are still developing and learning how to control (控制) themselves. The prefrontal cortex (前额皮质) is one part of the brain. It tells us we shouldn't eat junk food frequently. But this part is the last to mature (发育成熟) —it doesn't fully develop until we are in our early 20s.

So, what's the best way to say no to junk food? Exercise! When we exercise, the brain becomes less sensitive to food. And the prefrontal cortex can work better to help us control ourselves.

1. （1） Junk food usually has a lot of   and .
3. （2） 根据上下文判断文中黑体词的词义并配对。

   ⑴teenagers     A. people between 13 and 19 years old

   ⑵frequently      B. grow and change over the time

   ⑶develop         C. often; many times

5. （3） According to the article, who is more sensitive to junk food?

   A . A 13-year-old boy B . A 30-year-old man