14、         Mr. Morgan appears very cheerful in public, he is actually leading a  very unhappy life.   

A. When                           B. While                    C. As                           D. Since  

 

14、B

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         Mr. Morgan appears very cheerful in public, he is actually leading a  very unhappy life.   

A. When                           B. While                    C. As                           D. Since  

 

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