单项选择题

A．Because they are not accustomed to it.
B．Because they are not psychologically prepared for it.
C．Because their genes differ from those who have been tested for it.
D．Because they arc less sensitive to it than those who have been tested for it.
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单项选择题
A．That he is not a student this semester.B．That he is not a serious student.C．That he is not very concerned about the woman.D．That he is willing to compromise.
A．That he is not a student this semester.
B．That he is not a serious student.
C．That he is not very concerned about the woman.
D．That he is willing to compromise.
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