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Researchers from the University of Michigan in the USA found that the shape of astronauts’ brain changes during the spaceflight.

It is the first study to look into how the brain changes on the journey into space. Researchers looked at pictures of the brains of 26 astronauts. They all stayed in space. The photos were taken by high-tech medical machines called MRIS. Twelve of the astronauts stayed there for two weeks as Space Shuttle crew members. The other 14 stayed for six months on the International Space Station. All of them experienced increases and decreases in the size of different parts of the brain.

The researchers said that the longer an astronaut stayed in space, the bigger the differences in size were.

1.Where are the researchers from?

A The UK.

B The USA.

C China.

D Japan.

解析：选B。推理判断题。根据第一段第一句Researchers from the University of Michigan in the USA found that the shape of astronauts’ brain changes during the spaceflight. 可推知这些研究人员应该是来自美国，故选B。

2.The study looks into _______ on the journey into space.

A how the brain changes

B when the brain changes

C why the brain changes

D where the brain changes

解析：选A。细节理解题。根据第二段第一句It is the first study to look into how the brain changes on the journey into space. 可知，故选A。

3.What’s the Chinese meaning of the underlined word “high-tech”?

A 完美的.

B 高大上的.

C 高科技的.

D 时尚的.

解析：选C。词义猜测题。tech是单词technology（科技，技术）的缩写，由此可推测出该词的含义。照片是由一种叫MRIS的”高科技”医疗设备照的。选C。

4.How many astronauts spent time on the International Space Station?

A 12.

B 14.

C 16.

D 26.

解析：选B。细节理解题。根据第二段倒数第二句The other 14 stayed for six months on the International Space Station. 可知，故选B。

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

A Researchers looked at pictures of the brains of 12 astronauts.

B Twelve of the astronauts spent three weeks as Space Shuttle crew members.

C MRIS is a kind of camera which can take good photos.

D The longer an astronaut spent in space, the bigger the differences in size were.

解析：选D。综合理解题。根据最后一段The researchers said that the longer an astronaut spent in space, the bigger the differences in size were. 可知，故选D。