B. send people to live on Mars

　　C. select qualified astronauts for a mission to Mars

　　D. find out the effects of living for a long time in space

　　2. According to Paragraph 3 and Paragraph 4, in this experiment the astronauts　.

　　A. were exposed to sunshine in their small cells

　　B. lived in conditions similar to those of a real mission to Mars

　　C. were less stressed than they would have been on a real mission to Mars

　　D. killed time by checking their emails and reading the latest news updates

　　3. Which of the following problems may have been the biggest for the astronauts?

　　A. They couldn’t shower regularly.

　　B. They were far away from home.

　　C. They were isolated from society for a long time.

　　D. Language barriers existed between them.

　　4. What conclusion can be drawn from the experiment?

　　A. Human beings can live on Mars.

　　B. Human beings have learned enough about Mars.

　　C. Astronauts can stand any conditions during space travel.

　　D. Human beings have the potential to travel long distances in space.

　　(B)

　　Fluency in another language is one of the most important aims of a newcomer to another country.

　　In addition, understanding the culture and learning to communicate comfortably with people of that culture are as important as learning the rules of the language.

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