单选题 Which of the following is NOT the author's viewpoint?

A、 Students need not understand each word. when reading.
B、 A difficult text can be understood in a general sense by using contextual clues.
C、 Contextual clues can help students to increase their existing vocabulary base in a short time.
D、 The use of contextual clues can be the best way to improve students' reading skills.

【正确答案】 D

【答案解析】[分析] 本题考查阅读细节。选项A，B，C的论点作者在文章首段均有提及，选项D偷换了原文中第一句“one of the best ways to improve students’reading skills”这一概念，并非作者的观点。