I listened to Dr.Wilson's lecture about the protection of wild animals, but I was unable to grasp its key .
A. thoughts
B. points
C. notes
D. dots
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A. thoughts
(答案→)B. points
C. notes
D. dots
解析:A. thoughts想法 B. points 点,论点,见解 C. notes 笔记 D. dots圆点,小数点;句意:我听了威尔森博士的有关野生动物保护的演讲,但是我不能够理解它的要点。key point要点,固定搭配,故选B