阅读理解。 Nowadays, in the United States and other western countries, some teens are choosing to become vegetarians. That is, they choosing not to eat meat. There are many types of vegetarians, some of whom don't even eat animal products such as milk, eggs, or yogurt. Having balanced meals is very important, especially for teens who are growing up. So why are they becoming vegetarians? Well, each person chooses to become vegetarian for different reasons; The most popular reason is just wanting to be healthier. I decided to become a vegetarian when I was 10 years old, and it was much easier than you might think. But as a vegetarian, I have had a difficult time getting the proper nutrition (营养). Most doctors and scientists say that being vegetarians is very healthy, but many people aren't choosing the correct food to supplement (补充) the protein (蛋白质) in meat. If you're thinking about becoming a vegetarian, make sure that you look at your diet very carefully. And of course, pay special attention to your health when doing so. Being a vegetarian isn't for everyone, so don't be discouraged if you can't give up hamburgers and meat dumplings! Vegetables play an important role in people's daily meals, so even if you are not a vegetarian, they are still good for you. 1. Some teens choose to become vegetarians mainly because _____. A. they have no meat to eat B. they want to keep healthy C. they only like vegetables D. they can grow up quickly 2. If you decide to become a vegetarian, you should _____. A. eat only vegetables B. do more exercise C. become more careful in everything D. get the proper nutrition 3. Which is the best title of this passage? A. Becoming vegetarian B. Eating no meat C. Looking at your diet carefully D. Protecting animals