根据短文理解, 完成下列各题。

      One day, I was cooking with my friend Sandy in the kitchen. Suddenly, Sandy cut her finger. I went to her quickly. But to my surprise, I saw computer chips in her finger.

   “Now you know my secret, you have to die!” Sandy said and picked up the knife. “No, please, Sandy. Aren't we good friends?” I shouted. But before Sandy could say anything, she fainted.

    “Oh, Sandy!” I took her to hospital in a hurry. After a doctor checked her, he said, “I'm afraid we can't help her. Why don't you take her to a robot centre?”

      I hurried to a robot centre. A few days later, Sandy was well. She asked, ”Mary, why did you save me even after I tried to kill you? ”

“Because I'm sure you are my friend. Can you tell me where you are from?” “I'm from another planet. It's far from here. Thank you, my friend Now I see how friendly people are on the earth.”

      Two days later, a UFO came and picked her up. Since then I've never seen her.

根据材料内容，选择最佳答案。

If you want to make friends, what should you do?

Steps:

★Try to look on the bright side of things.

★Look for groups in your area that do something you are interested in. Maybe you will learn some new skills and meet some people who have many things in common with you.

Tips(建议，诀窍):

★Contact your friends at least once a week by telephone or e-mail, or by visiting them to find out how they are. Remember important things about them such as birthdays and weddings(婚礼).

★If you have an argument with your friends, say sorry first.

★Remember never to leave old friends just because you have made some new ones.

★Listen to others carefully. It's better to be a good listener.

★Be different. Don't try to change others through your own ideas.

Warnings:

★Never ask or give away(泄密) a friend's secret.

★Don't be afraid to stand up for what is right.

★You'd better not give your ID number, phone number or your home address to people that you have just made friends with.

2017年7月，中央电视台播出大型政论专题片《将改革进行到底》，其中第二集围绕市场经济体制改革进行全景报道。

该片指出，当前，石油、电力、铁路等多个行业开始向民间资本打开大门，混合所有制改革列为国有企业改革的突破口。市场化改革不断深入，市场体系不断完善．正为中国经济的结构之变提供坚强的制度保障。财税、价格、金融、信用体系等基础性、关键性的改革不断实现突破。

结合材料，说明我国是如何完善社会主义市场经济体制的。