C. Using gene technology, human babies can be cloned.

　　D. Doctors can cure cancer and heart disease with the help of gene technology.

　　49. What is the main purpose of writing this passage?

　　A. Expressing the writer’s idea that gene technology will benefit people

　　B. Telling people the advantages of gene technology

　　C. Telling the readers that gene technology will not benefit people

　　D. Explaining that gene technology will also do harm to the humanity

　　50. Which of the following worries people by using this technology?

　　A. Scientists have already successfully cloned sheep.

　　B. Most couple will normally give birth to babies.

　　C. A good number of babies will be cloned

　　D. The government will take action to control it.

　　C

　　A peer is a person who is about the same age as you. Peers affect your life, whether you know it or not, just by spending time with you.

　　Peers can have a good effect on one another. Maybe another student in your science class taught you an easy way to remember the planets in solar system. Maybe you got others excited about your new favorite book and now everyone’s reading it.

　　However, sometimes peers affect one another in another way. For example, one kid in school might try to get another to cut class with him, your soccer friend might try to persuade you to be mean to another player and never pass her the ball, or a kid in the neighborhood might want you to shoplift with him.

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