1. 阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入（1个词）或使用括号中词语的正确形式填空。

    When China's astronaut Zhai Zhigang carried out the spacewalk on September 27, he was wearing a spacesuit developed by Chinese scientists. Being worth more than 30 million yuan, the Feitian (飞天) spacesuit is not ordinary one.

    It （take）Chinese scientists four years to develop it. But what is special about the suit? First Let's take a look at why（astronaut） need to wear spacesuits.

    When you visit a world with little or no atmosphere, not(wear) a spacesuit, the following things would happen:

    You would become unconscious within 15 seconds because there is no oxygen.

    Your blood and body fluids(液体) would “boil” and then “freeze” there is little or no air pressure.

    You would receive various types of radiation.

    You could(hit) by dust or rock that moves at high speeds.

So, to protect youthese dangers, a spacesuit must:

    Have a pressurized atmosphere;

    Give you oxygen;

    Keep a(n) (comfort) temperature;

    Let you see clearly and move easily.

    The Feitian suit did all that and what it （do）made it like a mini-spaceship inthe astronaut stayed alive in outer space and carried out tasks.