以下是从本单元课文中摘出的原句。试试看，能填上吗？要注意词形变化！

1．Many scientists believe that the earth, ________ the sun and other planets in our solar system, was formed ________ five billion years ago．

2．Nearly three-quarters of the earth's surface ________ water．The earth is the only planet ________ water can ________ on the surface．

3．Almost all of this water ________ the oceans which ________ keeping the earth's temperature relatively stable．

4．These ________ heat ________ as they change into other elements．

5．The pressure of the rock above keeps most materials ________．

请根据下列提示写出相应内容。

1．存在v．________→存在；生存n．________

2．扩充；膨胀n．．________→扩张；扩大v．________

3．爆发；爆炸n．________→爆炸v．________

请根据下列提示写出相应内容。

1．相对地adv．________→相对的adj．________→相对论n．________

2．伸展v．________→伸展；延伸n．________

3．包围v．________→周围的adj．________→环境n．________

请根据下列提示写出相应内容。

1．大气；气氛n．________

2．释放n．________

3．收缩；萎缩v．________→(过去式)________→(过去分词)________

请根据下列提示写出相应内容。

1．大陆；陆地n．________

2．稳定的n．________

3．在……下面prep．________

4．信封n．________

阅读下面短文，用适当的词填空。

　　As a 4-time Olympic gold medalist in table tennis, today I'm here 　　1　　 China's 　　2　　 and the 400 million Chinese young people．

　　We know that the Olympic Games have been held in more than 20 cities 　　3　　 he world．Our athletes have enjoyed the 　　4　　 welcome of the people in many Olympic cities．We experienced this ourselves as members of the Chinese team in Barcelona, Atlanta and Sydney．We are 　　5　　 of the day when the Olympic Games come to Beijing and we have the 　　6　　 to repay the world's hospitality．

　　Let me 　　7　　 with you an experience I had when I joined the torch relay in Sydney．People were 　　8　　 and laughing with great joy．A little boy came up to me．His eyes 　　9　　 up when he touched the torch．I felt at that moment his life was changed．How wonderful it would be if the Olympic flame 　　10　　 to China and lights up the hearts of all Chinese young people．

　　Beijing will be great for the athletes．They will have great venues, a great Village, a new and 　　11　　 cultural experience, and more fans than you can imagine．

　　Now we are asking you to give us the 　　12　　 to personally experience a great Olympics．This will be a 　　13　　 in Olympic history, and in the 　　14　　 of China．

1．________　2．________　3．________　4．________　5．________

6．________　7．________　8．________　9．________　10．________

11．________　12．________　13．________　14．________

完成句子。

We ________ your suggestion ________　________　________(认为值得考虑)．

完成句子。

Our school ________　________　________　________　________　________　________(位于城市的东南部)，you can easily find it．

完成句子。

The young is reported ________　________　________　________　________　________(占很大比例)of that in China．

完成句子。

Who you are ________　________　________(没何不同)．It is the ability to do things that really matters．