Have you ever heard the idea that you need eight glasses of water a day? In fact, it won’t make you brighter and it won’t make you feel clear. It might, however, make you have to go to the washroom a lot.

Many people don’t understand the biology（生物学）behind their bodies. The fact is that when you understand how your systems work, you’re able to make better decisions.

For the most part, your body will tell you when you need to drink water because you’ve got these wonderful and surprising things-kidneys （肾脏）. Your body is an environment where everything needs to be in a good balance（ 平衡）. If levels of anything get too high or too low， then it is the job of the kidneys to keep them just right.

Imagine you are running for a long time and you’re losing water, then it may lead to dehydration. And then you’ll do whatever you need to get some water. So thanks to your kidneys, your body is really good at keeping water.

But if you stop counting eight glasses of water a day, how much should you drink? The answer is: there is no should. In fact, everything you have has water—an apple has water, so does your breakfast. So as long as you’re thirsty, trust your body.

Hello, I’m Betty. My mother likes going to the cinema. I usually buy her a cinema ticket or a movie magazine as a present for her birthday. My father likes chocolate and I always buy him some. I also like to buy him a CD because he likes music. My mother’s parents don’t like going to the cinema or listening to music and they don’t like chocolate. They never like watching sports but they like reading. I often buy them an interesting book. Tomorrow is my friend’s birthday. She doesn’t like shopping or expensive clothes and she doesn’t like going to the cinema. She likes concerts. I choose a concert ticket for her birthday.

I’ m Molly, from Argentina. I started learning English when I was eight. It was 6 years ago. A friend of mine, Jose, was going to take English classes and she didn’ t want to go alone. My mother asked me to go with her. I thought it was a good idea. After I started, I never stopped. It is really fun. I want to be an English teacher one day.

It is not easy to learn English. A lot of people think that you have to start learning at a very early age. I don’ t think that’ s true. You can learn it at any age. You need to practise. You can’ t just go to class, listen to the teachers, and do things that they ask you to do. That’ s not enough(足够的). You must practise a lot and use it.

I also think exposing yourself to(使自己接触到)real language is very important. There’ s so much different content on the Internet and you can find whatever you like. If you like movies, if you like sports, if you like music, if you like talk shows … You can find anything that you are interested in. Listen to real English and try to understand real English.

I think practice and exposure are two good ways of learning English. So why not try them right now?