No one can tell for sure when the building of the Great Wall was started, but it is popularly believed that it originated as a military fortification(要塞) during the 44.________（early） Zhou Dynasty. Late in the Spring and Autumn Period, some states extended the defense work to prevent the attacks from other states.

　　It was not until the Qin Dynasty 45.________ the separate walls were connected to form a defensive system by Emperor Qin Shi Huang. It took about ten years 46. ________ （finish） and the wall stretched from Gansu Province to Jilin Province. The wall not only served as 47._______

　　defense in the north but also symbolized the power of the emperor.

　　Today, the Great Wall 48. ________（become） a must-see for every visitor to China. Few can help 49. ________（say） “Wow” when they look at this giant dragon. It has become a 50.________（nation）pride of Chinese people.

　　★V．阅读理解（每题4分，共20分）

　　While Jennifer was at hose taking an online exam for her business law class, a monitor（监控器）a few hundred miles away was watching her every move.

　　Using a web camera equipped in Jennifer’s Los Angeles apartment ，the monitor in Phoenix tracked how frequently her eyes moved from the computer screen and listened the secret sounds of a possible helper in the room. Her Internet access was locked — remotely — to prevent Internet searches , and her typing style was analyzed to make sure she was who she said she was: Did she enter her student number at the same speed as she had in the past? Or was she slowing down?

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