A myth is something that is not correct， but many people believe． There are a lot of myths about the human brain．

    One of the biggest myths is that we only use 10 percent of our brains． The next part of the myth is that if we can learn to use the rest of our brains， then we'll be much smarter．People say this all the time， but it's absolutely not true! The truth is that although we don't know everything about the human brain， we know that each part of it has an important function（功能）． Modern scientists think the"10 percent myth" ridiculous（荒谬的）．

    The other most popular myth is about being" right brained" or "left brained"．According to this myth， people who use the right side of their brains are more artistic and creative． People who use the left side of their brains are better at math and science．This is as popular as the 10 percent myth， and it's also wrong． In 2013， a study at an American university examined the right brain and left brain myth． According to the study， we use both sides of our brains equally（相等地）．

    It's true that we use different parts of our brains for different things． We use our left side for language more， and our right side when we need to pay attention． But there is no evidence（证据）that creative people use the right side more of that scientific people use the left side more．

    We've talked about myths， so let's look at a few interesting facts about the brain． First of all， the brain feels no pain． Second， about 75 percent of the brain is made of water． It's also the fattest organ in your body． Here's another interesting fact about the brain． Around the time you turn 18 years old， it stops growing．

（1）The underlined word "This" in Paragraph 3 refers to　　．

A． the left brain myth

B． the right brain and left brain myth

C． the use of human brains

D． the study of an American university

（2）According to the facts mentioned in the passage，　　may use the left brain more．

A． Robert， who is learning English

B． Kate， who is drawing pictures

C． Jenny， who is designing clothes

D． Jacob， who is doing research

（3）Which of the following is TRUE about the human brain？　　

A． It is growing all life long．

B． The right side is used more by artists．

C． Some parts of it are not used at all．

D． Three quarters of it is made of water．

（4）The passage mainly tells about 　　．

A． the growing of the brain

B． different functions of the brain

C． right brain and left brain

D． myths and facts about the brain