It is obvious how bad movies will impact ________ children.
A、onA
impact有时也可以当作一个动词来用，与之搭配的介词仍然是on。句意：坏电影对儿童会产生什么影响是显而易见的。
People appreciate _______ with him because he is knowledgeable and humorous.
They built a highway _______ the mountains.
So far scientists have only acquired ________ understanding of the physical processes that cause earthquakes.
I would love ________ to the party last night but I had to work extra hours to finish a report.
The French maintain a ________ separation of personal and professional life.
