Everyone has traits (特性) that make us who we are. We have physical traits, like red hair, long legs and funny-looking toes. We also have character traits including humor, warmth, creativity and so on.

Certain physical traits are fully inherited (遗传), such as blue eyes and knobby knees. About 25,000 to 35,000 genes (基因) are in a single cell in the human body. These genes carry the traits that are passed down genetically from parents to their children.

Many traits exist between inheritance and development — the interaction with environment. One example is body shape. It tends to be passed down from parents. But once diet becomes a factor, environment begins to play an important role in how the body develops. Body shape is a trait that is a mixture of inheritance from parents and influence of environment.

So lots of our most important traits have been learned, rather than inherited. For example, if you’re really great at video games, it’s not because your parents passed down the skills in genes. It’s because you have practiced a lot of video games and developed those skills yourself. If you have kids who turn out to be great at video games, it is because they put in the hours, learned the skills, and memorized the moves that are necessary to play the video games well.

Of course, some of us have brains that are more advantageous to video game playing. Say you were born with a large and powerful part of the brain that controls your hand-eye coordination. That is inherited. What you do with it, how you choose to develop that advantage, is up to you.

You can pierce your nose or get a tattoo (纹身) — it doesn’t matter how much you change your body during the lifetime. None of those things will turn into genetic material to be passed down to the next generation. However, if your children grow up in an environment with role models who are pierced and covered in tattoos, they are more likely to get piercings and tattoos!

1. is a physical trait that is fully inherited.

A.The eye color B.The special diet

C.The body shape D.The pierced nose

2.What does the underlined word “That ” refer to ?

A.Video game playing. B.Advantageous brains.

C.The shape of your brain. D.Your hand-eye coordination.

3.According to the passage, the writer believes that .

A.character traits can hardly change during the lifetime

B.the skills of video game playing are passed down to kids

C.a kid’s hand-eye coordination isn’t related to inheritance

D.environment plays an important role in traits development

4.Which of the following would be the best title for the passage?

A.Why are Traits Important? B.How does Inheritance Influence Traits?

C.Where do Traits Come from? D.What are Physical and Character Traits?

On a cold winter afternoon, Susan was walking home from a supermarket. She was feeling a little tired because she was carrying her shopping bags. They were so heavy that she had to have a rest in the park. She walked towards the gate of the park. She noticed a poor man walking out of a restaurant in front of her. The man was holding a paper bag. He walked to a rubbish bin(垃圾箱)and started looking through it.

Susan suddenly felt sad. She knew this man would take all that he could get, so she went up to him and gave him some fruit. The man looked up in surprise and took the fruit.

A big smile appeared on his face and she felt very happy. They he said, “Wow! First someone gave me this sandwich, then the orange juice, and now some delicious fruit. This is my daughter’s lucky day. Thank you, girl.” Then he went away, singing a song.

Just then, Susan understood what the saying “Giving is getting.” really meant. Everyone in the world needs help and everyone can offer help.

Giving sometimes doesn’t cost much, but it means a lot to the people who you help.

1.Susan felt a little tired because she ______.

A.walked so fast B.looked through a rubbish bin

C.felt cold D.carried heavy shopping bags

2.The poor man felt _____when Susan gave him some fruit.

A.sad B.surprised C.interested D.kind

3.From the passage we may know the poor man’s daughter couldn’t get ____that day.

A.orange juice B.some fruit C.a new coat D.a sandwich

4.Which of the following is TRUE according to the passage?

A.The poor man had no money to buy food for his daughter.

B.It was the poor man’s daughter’s birthday.

C.The poor man asked Susan for some fruit.

D.The poor man’s daughter was ill.

5.The passage mainly tells us that ____.

A.giving means taking B.giving is getting

C.we shouldn’t look through rubbish bins D.we should give others fruit

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