单选题All of Mark's former students go to college. If the statement above is true, which of the following must also be true?AIf Ethan was not Mark's student, then he is not going to college.BIf Joyelle goes to college, then she was not Mark's student.CIf Ginger goes to college, then she was Mark's student.DIf Stephanie was Mark's student, then she is not going to college.EIf Steve does not go to college, then he was not Mark's student.
单选题
All of Mark's former students go to college. If the statement above is true, which of the following must also be true?
A
If Ethan was not Mark's student, then he& is not going to college.
B
If Joyelle goes to college, then she was& not Mark's student.
C
If Ginger goes to college, then she was& Mark's student.
D
If Stephanie was Mark's student, then& she is not going to college.
E
If Steve does not go to college, then he& was not Mark's student.
参考解析
解析：
如果题目给出的陈述正确，那么E也正确，Steve不可能是Mark的学生，因为马克的学生都上大学。A是错误的，因为Ethan不是Mark的学生并不能说明Ethan没有上大学。B也是错误的，因为如果Ginger上大学，那么他就是Mark的学生不成立，因为陈述上讲的是Mark的学生都上了大学，而不是只要上大学就是Mark的学生。C错误，因为C认为所有上大学的人都是Mark的学生。D认为如果Steve没有上大学，那么他就不是Mark的学生，与题干给出的陈述相反，不正确。
如果题目给出的陈述正确，那么E也正确，Steve不可能是Mark的学生，因为马克的学生都上大学。A是错误的，因为Ethan不是Mark的学生并不能说明Ethan没有上大学。B也是错误的，因为如果Ginger上大学，那么他就是Mark的学生不成立，因为陈述上讲的是Mark的学生都上了大学，而不是只要上大学就是Mark的学生。C错误，因为C认为所有上大学的人都是Mark的学生。D认为如果Steve没有上大学，那么他就不是Mark的学生，与题干给出的陈述相反，不正确。
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