Question

第三节：完形填空：（共10小题，每小题2分，满分20分）

阅读下面短文，掌握其大意，然后从21～30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。

Without the atmosphere there would be no weather, wind, rain, snow or clouds. Air is all around us, we live at the bottom of a great ocean of air. It is invisible, but we can     1     it when it moves. There are miles of air above us,     2    down with great weight on the earth and everything on it. Because air presses down on us from all      3    at the same time, and because we are able to bear this weight, we do not seem to feel it.    4  , scientists have proved that air has this weight, and that    5   that has weight creates a force called pressure. As changes in air pressure take place, they make air    6 .

Air is a gas that expands when heated, gets lighter, and moves    7  . When air is cooled, it gets heavier, sinks close to the earth’s surface, and flows like water in a great river. As warm air rises, cold air rushes     8   to take its place. Thus wind originates. The wind that blows high above us is caused by the warmer air running away from   9   air. The wind we feel near the earth’s surface is the heavy colder air trying hard to    10    the warmer air. Changes in temperature cause the air to move.

1. A. feel         B. taste         C. smell        D. touch

2. A. putting      B. getting        C. turning      D. pressing

3. A. ways        B. directions     C. oceans       D. rivers

4. A. So          B. While        C. However     D. Unless

5. A. everything    B. something     C. nothing      D. anything

6. A. move        B. rise          C. fall         D. stay

7. A. inward       B. downward    C. upward      D. outward

8. A. out          B. in           C. away       D. up

9. A. colder        B. warmer      C. lighter      D. heavier

10. A. absorb       B. catch         C. feel        D. prevent

Answer 1

1.A  

2. D   

3. B   

4.C  

5.D  

6.A  

7.C 

8.B  

9.A   

10.B