If you go to a fast food restaurant, you will probably see a lot of teenagers. Today, many teenagers are overweight, and some of this is because of their bad eating habits. Most teenagers love food with a lot of fat, oil, salt and sugar. People often call this kind of food “junk food”.
But bad eating habits go beyond fast food. We find many teenagers eat unhealthily. Some don’t have breakfast before they go to school. During the day, some don’t have a proper meal for lunch. In a recent survey conducted among 2,000 students at one school, scientists found that over two-thirds of the students didn't follow a healthy diet. They didn’t like vegetables, and many of them didn’t like to eat fruits. They preferred to eat food with a lot of salt, sugar or fat.
Parents today also worry about their children’s diet. Some doctors give the following advice:
Teenagers shouldn’t eat too much junk food.
Teenagers shouldn’t eat food with too much salt. Salt can cause high blood pressure in the future.
Teenagers should eat food with less fat, oil and sugar.
Teenagers need to eat some fruits and vegetables every day. Fruits and vegetables are rich in vitamins and have little fat.
Teenagers need to drink more milk. Milk will help their bones grow.
Teenagers need to eat breakfast every day. This is good for their body and mind.
According to the passage, which of the following is NOT true?

A．Junk food has much fat, oil, salt and sugar.

B．The recent survey shows that over 1,300 students have an unhealthy diet.

C．To eat healthily, teenagers should have more fruit, vegetables and milk.

D．Eating too much sugar can cause high blood pressure in the future.

What’s the passage mainly about?

A．Unhealthy junk food.

B．Bad eating habits and advice on healthy diets.

C．Teenagers’ problems.

D．One of the reasons for teenager’s overweight.

One of the tips the writer gives is ______.

A．to eat everything with any other person

B．not to go to well-known places

C．not to visit dangerous places

D．to eat the food full of vitamins