in what country was be born把in放在born后行不?在书上看到in what country was be born?(较正式)和 what country was be born in?(不正式)都是正确的请问下面的都对吗?Who are you talking to on the phone?写成To whom are you tal

in what country was be born把in放在born后行不?
在书上看到in what country was be born?(较正式)和 what country was be born in?(不正式)都是正确的
请问
下面的都对吗?
Who are you talking to on the phone?写成To whom are you talking to on the phone?
In which year were you bron?写成which year were you born in?
For what purpose did you invite me to come here?写成
What purpose did you invite me to come here for?

以上都是正确的.

全部都可以这样改，非常正确，只不过这些把介词提前了：
To whom are you talking to on the phone?
In which year were you born?
For what purpose did you invite me to come here?