问题

Some people hold the view that the new machine isadvanced, while others are still skeptical _____ whether it is of practicaluse.

A:with
B:about
C:for
D:on

正确答案是：

同类题型

Dad, you have worked for so long time. Stop and have a rest.

20. When Jack arrived, he learned Mary ____ for almost an hour.

It was the middle of the night _______ my father woke me up and told me to watch the football game.

How do you know Jimmy will come out first in the final exam— _____. He is always working hard and he is very clever.

The husband and wife did agree ______ each other _______ it