题目

For thousands of millions of years the moon has been going round the earth. At that time, the moon was the   36  satellite(卫星)of the earth. Today,   37  ,  the earth has many other satellites. All of them are  38  by man. These man-made satellites are very much smaller than the moon. However,  some of them will still be going  39  the earth thousands of years from now. Man-made satellites don’t  40  because they are going too fast to do so. As they speed along,  they  41  to go straight off into space. They  42  out of the earth,  or its gravity,  which  43  them from doing this. As a result,  they travel in an orbit(轨道)round the earth. If a man-made satellite travels about at a certain height,  it can keep going  44   round the earth,  just like the moon. This is  45  it is above the atmosphere(大气),  and there is nothing to  46  it down. If it travels  47  than that,  it will be slowed down so much that it will  48  the earth. Men have  49  spaceships to the moon and to the two  50  planets Mars(火星) and Venus(金星). By putting a camera on  51  the spaceship to the moon,  men have been able to  52  photographs of the other side of the moon. This side is always  53  from us as the moon  54  the earth. The  55  were later transmitted by radio to the earth. They showed that the other side of the moon is very much the same as the side that turns towards us. 36. A. first             B. second                  C. last                      D. only37. A. then            B. however                C. though                 D. so38. A. found          B. discovered            C. made                   D. sent39. A. with            B. round                    C. behind                 D. after40. A. fall             B. rise                        C. break                  D. stop41. A. want          B. wish                      C. hope                   D. tend42. A. pull           B. push                      C. take                     D. launch43. A. protects    B. keeps                    C. makes                 D. discourages44. A. in and in    B. on and on              C. out and out          D. up and up45. A. because    B. why                       C. whether               D. when46. A. hand         B. force                      C. slow                     D. bring47. A. higher       B. longer                     C. more                    D. lower48. A. leave away           B. fall to      C. go after                  D. knock over 49. A. gave         B. offered                    C. sent                   D. drove50. A. nearest      B. smallest                  C. biggest               D. closest51. A. board        B. right                       C. left                     D. top52. A. form          B. film                        C. catch                 D. take53. A. far              B. hidden                  C. different             D. separated54. A. leads           B. obeys                   C. circles               D. pursues55. A. information   B. letters                  C. sounds              D. photos 答案：人类已发射了许多卫星到太空去，它们在太空中运转。同时，人类还将宇宙飞船发射到太空中去，为人类揭开太空之谜。 36.【解析】选D。从常识以及下文的many other satellites可知在人造卫星之前月亮是地球惟一(only)的卫星。 37.【解析】选B。前后两句间有转折关系，所以用副词however“然而”。 38.【解析】选C。根据下文These man-made satellites可知这些卫星是人造卫星。 39.【解析】选B。根据上文going round the earth可知这些卫星绕着地球转。 40.【解析】选A。根据下文的they travel in an orbit round the earth. 可知这些人造卫星由于速度快所以不会掉(fall)下来。 41.【解析】选D。当加速时，卫星易于(tend to)进入太空。 42.【解析】选A。卫星离开(pull out of)地球，进入轨道。 43.【解析】选B。地球重力阻止卫星离开地球。keep. . . from doing . . . “阻止……做某事”。 44.【解析】选B。从上文可知卫星会一直绕着地球转。on and on“不停地”。 45.【解析】选A。本句介绍前句的原因。This is because. . . “这是因为……”。 46.【解析】选C。根据上下文可知大气会使卫星慢下来。slow sth. down“使……慢下来”。 47.【解析】选D。与上文above the atmosphere 构成对应，所以使用lower。 48.【解析】选B。根据第二段第一句可知如果它的速度慢下来，卫星会掉入(fall to)地球。 49.【解析】选C。人们已经把宇宙飞船送上(send)了月球。 50.【解析】选A。由常识可知Mars(火星) and Venus(金星)是最近的(nearest)两个星球。closest表示“最靠近的”。 51.【解析】选A。board the spaceship“在宇宙飞船上”。 52.【解析】选D。take photographs of“拍照”。 53.【解析】选B。根据下文可知the other side of the moon 是月球背朝地球的那一面。 54.【解析】选C。月球围绕(circle)地球转。 55.【解析】选D。根据上文提到的photographs 可知将照片(photos)发回地球。

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