问题
单项选择题
The passage you are reading is the beginning part of a report in the original. Then, what is "This", the first word, most probably referring to
A．An offered illustration.
B．Part of a textbook on politics.
C．What the author is going to write.
D．The principle that voters are shrewder than' most politicians believe.
答案
参考答案：C
解析：[分析] 推断题型。 第一段第一句的This is offered as a textbook illustration of the principle...(这个可作为……原则的文本例证)，显然是一个引出下文的句子。