Choose the correct word to complete the dialog.
A
Could you tell me
how
/
where
the entrance is?
B
Yes. It’s at the side of that building.
A
I wonder
what
/
when
made the girl so happy.
B
She’s happy because her friends threw her a birthday party.
A
What is his report about?
B
It is about
how
/
when
the city managed its resources over the last ten years.