2019学年度外研版选修八Module 5 Section ⅤWriting 阅读学案设计

　　Ⅰ.完形填空

　　For thousands of millions of years the moon has been going round the earth. During this time, the moon has been the __1__ satellite of the earth. Today, __2__，the earth has many other satellites all __3__ by man. These man­made satellites are very much smaller than the moon. However, some of them will still be going __4__ the earth thousands of years from now.

　　Man­made satellites do not __5__ because they are going too fast to do so. As they speed along, they __6__ to go straight off into space. They __7__ out of the earth, or its gravity, which __8__ them from doing this. As a result, they travel in an orbit round the earth.

　　If a man­made satellite travels about at a certain height, it can keep going __9__ round the earth, just like the moon. This is __10__ it is above the atmosphere, and there is nothing to __11__ it down. If it travels __12__ than that, it will be slowed down so much that it will __13__ the earth.

　　Men have __14__ spaceships to the moon and to the two __15__ planets: Mars (火星) and Venus (金星). By putting a camera on __16__ the spaceship to the moon, men have been able to __17__ photographs of the other side of the moon. This side is always __18__ from us as the moon circles the earth. The __19__ are later transmitted by radio to the earth. They showed that the other side of the __20__ is very much the same as the side that turns towards us.

语篇解读：在人造卫星出现之前，月亮是地球唯一的卫星。人造卫星能在太空中正常运转的原因是它位于大气之上，如果运行高度下降的话，卫星就会掉下来。

　　1．A.biggest　　　　　　　　 　B．brightest

　　C．last D．only

　　解析：选D　从下文可知，在人造卫星出现之前，月亮是地球唯一的卫星。

　　2．A.besides B．however

　　C．though D．therefore

解析：选B　上文说月亮是地球唯一的卫星，而下文说后来有了很多别的卫星，所以是转折关系。副词though表示"可是，然而"，放在句中时，其前后没有逗号。however"然而"放在句中时，前后可以有逗号，故选B项。