Question

http://prntscr.com/6ru7r6

Answer 1

she is his sister :)

Answer 2

Of course it can't be his teacher. In the paragraph, it says "the teacher". The speaker most likely doesn't talk in 3rd person. (No one really does.)

Answer 3

And teachers wouldn't call their students "cute".

Answer 4

I'm thinking it would probably be his sister.

Answer 5

Hint: "I think that runs in our family or something."