四、词汇(共5小题；每小题1分，满分5分)
请根据句意从方框中选择合适的单词，并用其适当形式填空，使句子通顺。
wise twenty silent possible study
51. Nobody knew what to say and they just sat there in .
52. Both Tom and Joe became famous and wealthy in their .
53. Do you agree with the of living on Mars for humans in the future?
54. Children should be taught to spend their pocket money .
55. Kitty was busy when I went to see her yesterday. She for an exam.

51.silence 52.twenties 53.possibility 54.wisely 55.was studying

五、阅读短文，根据句意或括号内单词的正确形式填空，每空一词(共10小题；每小题1分，满分10分)
Zu Chongzhi was one of the greatest mathematicians in ancient China. He was born during the Northern and Southern Dynasties. From a young age, Zu was taught a lot of knowledge about science by 56 (he) father. The little boy was 57 (interest) in almost all of the subjects, especially in maths.
Zu was best known for his calculation of pi (π). 58 (accord) to the record, he did all the work using nothing but little sticks made of wood or bamboo. 59 took him lots of time to work out the value between 3.1415926 and 3.1415927. No one at that time was able to do 60 (good) than Zu. And now the 61 (achieve) is still praised by people around the world. In 62 to remember Zu, some mathematicians suggest calling pi “Zu Lyu”.
Zu was successful not only in 63 , but also in astronomy (天文学). He worked out that a year should be 365.242814 days long and created the Daming Calendar. However, government officials at that time 64 (agree) with Zu. The great mathematician never saw his calendar put into use. About ten years after his 65 (die), the Daming Calendar was finally accepted.
Zu was an inventor, too. He once made a vehicle that carried a pointer (指针). No matter how the vehicle turned, the pointer always pointed to the south.
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56.his 57.interested 58.According 59.It 60.better 61.achievement 62.order 63.maths 64.disagreed 65.death