题目内容：

Don't you think it's very necessary__us __learn geography well.A for ,to B of ,to ,选哪个,为什么

优质解答

A
it is necessary for sb.to do sth.
对某人来说做某事是有必要的
固定搭配.
希望能帮到您,我用的是手机,如果有疑问请发消息问我,我收不到追问~