"Where's your home?"
I believe thats regional. When i had a teacher from mainland china, she used er a lot. A teacher i had from Taiwan never used er, and used li in this situation.
So, if you are doing it on the computer, do you input with a keyboard? I am on the app, and can only choose between specific characters.
It said that is the correct answer but did not give me one of the characters
The 在 is needed, imagine someone said "where your home?" It isn't grammatically correct.
Why is 你的家是哪儿？ not accepted? Is there any rule about 是 not being used with locatives?