Do you wake up every day feeling too tired, or even upset? If so, then a new alarm clock could be just for you.

       The clock, called SleepSmart, measures your sleep cycle, and waits 67   you to be in your lightest phase of sleep  68  rousing you. Its makers say that should  69  you wake up feeling refreshed every morning.     

As you sleep you pass 70  a sequence of sleep states — light sleep, deep sleep and REM (rapid eye movement) sleep — that  71  approximately   every 90 minutes The point in that cycle at which you wake can   72   how you fell later, and may  73   have a greater impact than how much or little you have slept. Being roused during a light phase 74  you are more likely to wake up energetic.  

      SleepSmart  75  the distinct pattern of brain waves 76  during each phase of sleep, via a headband equipped 77  electrodes(电极) and a microprocessor. This measures the electrical activity of the wearer’s brain, in much the  78  way as some machines used for medical and research  79 and communicates wirelessly with a clock unit near the bed. You  80  the clock with the latest time at  81  you want to be wakened, and it 82   duly(适时地) 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.

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[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

76. [A] proceeded   [B] produced   

[C] pronounced    [D] progressed

77. [A] by                    [B] of   

[C] with                  [D] over

78. [A] familiar          [B] similar 

[C] identical   [D] same

79. [A] findings         [B] proposals

[C] prospects       [D] purposes

80. [A] prompt          [B] program

[C] plug                 [D] plan

81. [A] where           [B] this

[C] which                [D] that

82. [A] then                [B] also

[C] almost          [D] yet

83. [A] claim           [B] conclusion  

[C] concept        [D] explanation

84. [A] once              [B] after

[C] since              [D] while

85. [A] Besides       [B] Despite     

[C] To               [D] As

86. [A] what              [B] how   

[C] whether       [D] when