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。
There are many sales this season, during which stores will lower their _______ prices.
The wounded soldiers would recover quickly if they were well ________.
You’d better leave things ________ if you don ’t know how to deal with them
He declined _______ more about it.
名词解释：silentpartnership
