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A. teach students to learn from mistakes B. help students see what a business is like C. sell more stationery and snacks to students D. start a class on how to use money in the store 5. What is this passage mainly about?

A. The school's new program, a student-run store. B. The results of a survey on the student-run store. C. The reasons of opening a student-run store. D. The rule of the student-run store.

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3. D µã²¦£ºÊý×Ö¼ÆËãÌâ¡£¸ù¾ÝµÚÈý¶ÎÖС°...it is open each school day during break time from 2 to 2£º30 p. m¡±¼ÆË㣬¿ÉÖª¿ª·Åʱ¼äΪ30·ÖÖÓ£¬¹ÊÑ¡D¡£

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What was living in the ISS like?

Living in space is common to astronauts. But what if it is a task of nearly a year?

US astronaut Scott Kelly was in the International Space Station (ISS) for 340 days. It is the longest time that a US astronaut has spent in space at a time. Kelly's stay is part of the Twins (Ë«°ûÌ¥) Study. When Scott

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Kelly spent nearly a year in the ISS, his twin brother Mark Kelly lived on Earth. They gave scientists more ways to study human space flight.

Usually living in the ISS for such a long time is boring. Was it the same for Kelly? Let's take a look.

Good morning, everyone!

It's time to enjoy a sunrise. But for Kelly, it was one of the 16 sunrises he saw each day in the ISS. Isn't that cool?

Work comes first.

During his stay, Kelly and his partners did about 400 science experiments. One of them was about planting vegetables. And they did it! Growing vegetables will be helpful for longer space journeys.

Moving with microgravity (Î¢ÖØÁ¦)

As we all know, space is a place with microgravity, which influences (Ó°Ïì) human bodies. So Kelly did exercise for more than 700 hours in the ISS. That is about two hours of exercise a day. Microgravity also makes some easy things difficult. Kelly often slept in a sleeping bag, or his arms would float (Æ®¸¡) in front of him all the time.

Boring? Why not do something for fun?

Kelly loved taking photos from space and sharing them with the world online. Even President Obama is his fan. Under one of his photos, Obama wrote, ¡°Hey, loving the photos. Do you ever look out of the window and just freak out (ÏÅ»µÁË)£¿¡±¡°I don't freak out about anything,

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Mr. President. Except getting a question from you, ¡± Kelly replied. ÊÔ×Å×öÒ»×ö

¸ù¾Ý¶ÌÎÄÄÚÈÝ£¬ÅжÏÕý(T)Îó(F)¡£ 1. How long did Kelly stay in the ISS?

___________________________________________________________ 2. Why did scientists start the Twins Study?

___________________________________________________________ 3. What did Kelly have to do because of microgravity?

__________________________________________________________ 4. Did President Obama enjoy Kelly's photos?

__________________________________________________________ 5. What was Kelly's life in the ISS like? Why? (Give one example.) __________________________________________________________

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