answers.

　　Although online classes have existed for more than a decade ，the concern over cheating

　　has become sharper in the last year with the growth of "open online courses." Private colleges，public universities and corporations are jumping into the online education field . spending millions of dollars to attract potential students，while also taking steps to help guarantee

　　honesty at a distance.

　　Aside from the web camers, a number of other hight-tich methods are becoming increasingly

　　popular Among them are programs that check students’ identities using personal information,such as the telephone number they once used.

　　Other programs can produce unique exam by drawing on a arge list of questions and can recognize possible cheaters by analyzing whether difficult test question are answered at the same speed as easy ones ,As in many university classes ,term papers are scanned aganinest some large Internet data banks for cheating.

　　41.

　　Why was Jennifer watched in anonine exam ?

　　A.To correct her typing mistakes.

　　B.To find her secrets in the room.

　　Cto prevent her form slowing down.

　　D.To keep her from dishonest behaciors.

　　42. The underlined expression cutting edge in Paragraph 3 is closest in meaning to ______.

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