I was ______ the train when she phoned.
on
Were you _____ Lisa’s party?
at
She hung a picture ______ the wall.
on
Eric is studying _____ the library.
at
I left my wallet _____ the table.
on
They live ______ the 2nd floor.
on
He found it difficult to concentrate _____ class.
in
I live _____ 123 Main street
at