---- I am not able to solve some practical problems using Newton’s First Law of Motion.
----That’s just most of the students are puzzled easily.
A. what
B. why
C. how
D. where
网友回答
A. what
B. why
C. how
(答案→)D. where
解析： where 引导的表语从句, where表示抽象的地点。句意：这正是大部分学生困惑之处。