Question

 The water and the land are thought part of the earth surface (表面）.The air is 1     thought a kind of blanket (毯子）2    the earth. But it is 3      than that. Maybe you have    been in a cave (洞穴） 4     in the earth. Did you    think about the air that was in the cave? The land has some air mixed in it. Air is even mixed    5     the water in the sea. These examples 6        that some air is below the

earth ’ s surface as well as above it.

Men once 7     that there were four basic things from which everything else was made. They 8     these things—earth, fire, air and water the four elements (元素).    9     man made more observations， they 10     that fire was not an element. 11      ,  they  concluded (得出结论）that land, air and water were not elements, 12        . In fact, there are more than    100 elements from 13        scientists believe all things    are made. 14     land, air and water are not elements, they are three main parts of man’s environment (环境）.You will 15     more about them as you study the earth.

(   ) 1. A.    usually    B. hardly

C. never    D. sometimes

(   ) 2. A.    above    B. around

C. across    D. among

(   ) 3. A.    better    B. more

C. less    D. worse

(   ) 4. A wide    B. high

C. Long    D. deep

(   ) 5. A. at    B. in

C. with    D. to

(   ) 6. A. show    B. say

C. have    D. do

(   ) 7. A. found    B. thought

C. knew    D. understood

(   ) 8. A. called    B. told

C. showed    D. said

(   ) 9. A. That    B. For

C. As    D. So

(   ) 10. A. believe    B. planned

C. found    D. want    .

(   ) 11. A.    End    B. Finally

C. Hardly    D. Nearly

(   ) 12. A.    too    B. neither

C. also    D. either

(   ) 13. A.    what    B. who

C. which    D. that

(   ) 14. A.    When    B. As

C. Since    D. Though

(   ) 15. A.    exam    B. decide

C. exercise    D. know

Answer 1

1. A    2.    B    3.    B    4.    D    5.    C    6.    A    7.    B    8.    A

9.    C    10. C 11.    B 12.    D    13.    C    14. D    15.    D