We want to explore and try to better understand the world in which we live. Space exploration is one of the ways.Through the exploration of space, we can begin to unravel the mysteries of our universe, and to better know our living environment.

    Space exploration provides us with knowledge about the beginning of our solar system, our own planet and ourselves. It also helps answer the questions that have puzzled us for many years. Solar system exploration is important because it is good for us.

Space technology has become an important part of our daily lives. Some technology uses satellites to communicate. Satellites are also used to examine the changes in the Earth's climate and seas, for weather report and for military. We also use satellites in food production. Because of the use of space technology in crops, fewer and fewer people will suffer hunger.

   The space program provides a chance for nations to work together. The cooperation(合作) promotes peace and understanding between governments and their people. Many governments have taken part in the space technology, including the United States, Russia, Japan, the European nations and India. In the near future, other nations will take part in it. In fact, the United States remains the leader in new space technology.

①尽快             

②in fear            

③agree with         

④保持安静         

⑤降落场          

（1） knife (复数)                      

（2）receive (第三人称单数)                

（3）damage (现在分词)             

（4）spread (过去分词)           

（5）explain (名词)                    

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，在空格处填入一个适当的词或者使用括号中词语的正确形式填空。

    Over millions of years ago, there were deserts. Now about one fifth of the Earth's surface         (be) deserts. The size of the world's deserts is always        (change). Deserts can be hot or cold. The Australian Desert is a hot desert, while the Gobi Desert in Mongolia is an example of a cold desert. Deserts are dry areas        less than 50 cm of rain falls each year. The Sahara Desert in Africa receives less than 1.5 cm a year.        rain doesn't fall very often in deserts, sometimes even for years, there can be heavy rain       (sudden). Because they are dry, deserts have wide changes in temperature each day. When the sun        (go) up, it is very hot. At night, the heat        (receive) by the ground during the day        (quick) disappears(消失), and then it becomes very cold. Because         the change, living in the desert is very difficult. Man can make deserts, but they can also stop them from getting larger and larger. Planting trees can prevent the sand from        (spread).

（1）你看起来很不高兴。发生什么事了？

  You look very unhappy. What               you?

（2）快一点，飞机半个小时后就起飞了。

  Hurry up! The plane will               in half an hour.

（3）她很高兴照顾那个小孩，因为她非常喜欢孩子。

  She                             look after the kid, because she likes kids very  much.

（4）在昨天的聚会上，Alice为客人们跳了舞。

  Alice               the guests at the party yesterday.

假设有外星人存在，请你根据以下提示写一篇短文，想象外星人的样子和他们的生活。要求80词左右，可适当发挥。开头已给出，不计入总词数。

内容提示：  

①外星人生活在其他星球上，他们长着大大的头，有一双大大的眼睛，个子很小；

②他们看似弱小，实际很强壮，他们不需要喝水，不需要呼吸，也不需要睡觉；

③与人类不同的是，他们总是乘着UFO去他们想去的地方。