问题
选择题
Some people hold the view that the new machine is advanced, while others are still skeptical _____ whether it is of practical use.
A．with
B．about
C．for
D．on
答案
答案：B
题目分析：固定搭配be skeptical about sth，意思是对……疑惑，故选B。
点评：这些固定用法平时要多归纳、总结和记忆。