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Overloaded with work, school teachers now get far less sleep than they ______.

A.shall B.should C.may D.might 

B

解析试题分析:句意:在超负荷的工作下,学校老师现在的睡眠要比他们应该的睡眠少。A将;B应该;C可以,可能;D可能。Shall指根据法律规定或者说话人的警告,命令等;should指按道理和义务的应该;may和might表示可能性,根据句意可知选B。
考点:考查情态动词。

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