题目：
According to the passage, an unusual feature of Mary was that she ______.
A．was not much older than Phyllis
B．wanted to become a teacher
C．was comparatively well educated
D．decided to take charge of Phyllis's education
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
平面的距离之间可形成明显差别