四、阅读理解(共15小题，每题3分，共45分)
阅读下列短文，然后根据短文的内容从每小题的四个选项中选出最佳的一项。
A
The body that is nearest to the Earth is the moon. It circles the Earth and is therefore known as a satellite of the Earth.
Natural as well as man-made satellites circle the planets in a fixed path or orbit (轨道). Why do satellites stay in orbit? Why don't they shoot off into outer space?
This behaviour of satellites can be explained by doing a simple experiment. Tie a stone to a piece of string and circle it around your head. If you let your end of the string go, the stone will not keep moving in a circle. It will fly off in a straight line.
Moving things always travel in straight lines at the same speed unless they are acted on by an external force. When the stone is circling around your head, the string keeps pulling the stone inward so that it travels in a circle rather than in a straight line.
A satellite stays in orbit because the planet's gravitational (重力的) force keeps pulling on it,just as the string keeps the stone moving in a circle.
There are many man-made satellites orbiting around the Earth.
Man-made satellites can be used for various purposes. Depending on their use, we call them by different names, such as: weather satellites which help in forecasting (预报) the weather,communication satellites containing special equipment and scientific satellites carrying scientific equipment which can gather various information about space.
The information sent back by man-made satellites has helped scientists to send manned spacecraft safely into space.
36. The example of the stone is used to__________.
A. feel the moving of satellites
B. find the secret of satellites
C. show the force that drives satellites
D. explain the behavior of satellites
37. Without gravitational force ,the satellites would__________.
A. fly off into outer space
B. move in circles
C. circle around the earth
D. stay in orbit
35. Man-made satellites can NOT be used in providing __________.
A. weather information
B. equipment information
C. space information
D. communication information
B
Two farmers were on their way home one evening after a hard day's work. Both were tired. They happened to look up at the sky and saw a black cloud overhead.
"Ah!" said one farmer,"tomorrow we shall have rain and the rice will grow well. " The second answered," nonsense (胡说),the rain will only damage the crops (撞稼). "
So they began to quarrel (争吵). Just then a third farmer came along and asked them why they were quarreling. Both farmers explained about the black cloud.
"What cloud?" asked the third farmer. They all looked at the sky. The cloud was no longer there.
39. The two farmers __________ that day.
A. had a holiday
B. didn't work
C. had worked hard
D. wanted to quarrel with each other
40. The two farmers quarreled because__________.
A. they were hungry
B. it rained
C. one said the rain would be good for the crops and the other didn't think so
D. they both hoped for rain
41. The third farmer came and said to the other two. He__________.
A. wanted to make friends with them
B. wanted to join them in the quarrel
C. wanted to know why they were quarreling
D. had nothing to do
42. How many farmers said that the rain would be helpful?
A. None
B. One
C. Two
D. Three
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