He hurried home, looking behind _____ as he went.
—Tom, may I remind you that we will go to see the movie Coming Home directed byZhang Yimou tomorrow morning?—Oh, that’s right. I __ about it.
Today we have chatting rooms, text messaging and emailing, but we seem ______ the artof communicating face to face.
_____, he has a lot of knowledge about computer.
—I’m worried about the coming test!—______, you can do it!
_______ you don’t have much experience in this field, why don’t you ask ProfessorWang for advice?