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 ear 题目和参考答案——青夏教育精英家教网—

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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 ________．

答案：
解析：

　　1．as well as; at least

　　2．is covered with; on which; exist in liquid form

　　3．makes up; play a very important role in

　　4．give out; all the time

　　5．from melting

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