The expressions they use might whom they are speaking to or how well they know each other.
Which sound is different from the other(与其它不同)?
Daniel is a ___________ football player. He plays football ___________.
—Are you in ___________? —Yes, I am.
—Can you help me _________ this cat? I go to my grandparents’ home this afternoon. —OK.
—__________? —No, it’s on the sofa.