(适当地) wakes you during the last light sleep phase before that.
   The (83) was invented by a group of students at Brown University in Rhode Island (84) a friend complained of waking up tired and performing poorly on a test. “(85) sleep-deprived people ourselves, we started thinking of (86) to do about it,” says Eric Shashoua, a recent college graduate and now chief executive officer of Axon Sleep Research Laboratories, a company created by the students to develop their idea.
67.A)beside       B)near          C)for            D) around
68.A)upon        B)before        C)towards        D) till
69.A)ensure       B)assure        C)require         D) request
70.A)through      B)into          C)about          D) on
71.A)reveals       B) reverses      C)resumes       D) repeats
72.A)effect        B)affect         C)reflect        D) perfect
73.A)already       B)ever         C)never          D) even
74.A)means        B)marks        C)says          D) dictates
75.A)removes      B)relieves       C)records       D) recalls
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