Tom made a few friends in China and he __________them by e-mail last year.A. keeps in touch withB. keeps up withC.kept in touch with
How much money did the ticket?
I don't know her name. He doesn't know, .
"______ I borrow your bike?" "Sure. Here you are."
He seems _______ nice.
More than two _______years ago, people knew little about the universe.