[填空题]It’s important for astronauts to exercise in order to keep their muscles fit.

[填空题]It’s important for astronauts to exercise in order to keep their muscles fit.

[填空题]It is important for astronauts to exercise in order to keep their muscles fit.

[简答题]It is important exercise regularly.

[单项选择]

In about two years, NASA astronauts will go into space with personal assistants. Robotic assistants, of course. About the size of softballs, these personal satellite assistants (PSAs) can float throughout the space shuttle or space station, automatically monitoring life support systems, snapping photos, and taking over monitoring tasks from failed sensors. They’re equipped with collision avoidance system so they won’t bump into anything Naturally, they’re wireless. Thanks to their videoconferencing capabilities, the PSAs offer a virtual presence for ground crews and scientists, letting them advise astronauts--in real time --in the midst of their experiments. The PSAs. will be stowed until the spacecraft reaches orbit (天体运行的轨道). And then activated by the astronauts, ground crews, or even by the spacecraft itself or other PSAs requesting help, they can work automatically or respond to voice or radio commands, and can exchange information with the spacecraft’
A. With the help of PSAs, NASA astronauts can deal with many affairs in the space shuttle or space station more easily.
B. PSAs are mechanical devices which can float all over the space station without any collision.
C. PSAs works only under the voice or radio commands of astronauts.
D. PSAs can track inventories if "smart" identification tags are added to inventory items.

[多项选择]Groups or organizations are an important part of some people’s lives. Why are groups or organizations important to people Write an essay of about 400 words to state your view.
In the first part of your writing you should present your thesis statement, and in the second part you should support the thesis statement with appropriate details. In the last part you should bring what you have written to a natural conclusion or a summary.
You should supply an appropriate title for your essay.
Marks will be awarded for content, organization, grammar and appropriacy. Failure to follow the above instructions may result in a loss of marks.

[填空题](While) experts in basic science are important, (skilled talents) should be the (overriding) majority since they are (at heavy demand) in the market.

• A. While
• B. skilled talents
• C. overriding
• D. at heavy demand

[填空题]You can make the best of exercise by integrating some form of exercise into ______.