单选题 The text specially states that

A、 direct experiences are more valuable than indirect ones.
B、 whatever attitudes a child learns in school have already been introduced at home.
C、 teachers can sometimes have an unwholesome influence on children.
D、 teachers should always conceal their own attitudes.

【正确答案】 C

【答案解析】[注释] 总结归纳题。本题问：本文专门阐述了什么?最后一段中作者提到because her influence can be negative if she has personal prejudices．．．(教师如果存有个人偏见的话，会对学生产生不良影响……)。可见，正确的选择应为[C]。注： unwholesome不良的，不健康的。
注意：本文的试题要求考生对文章中的有关句子细细推敲才能正确解题。对这种试题考生应深入分析命题者的思路，才能逐渐把握要领，学会解题的方法。