British people usually shake hands the first time meet.
——How long have you worked here?——__________________.
Peter ________ to help our math teacher carry books yesterday.
——What’s your mother?——She_________ a teacher, but now she is a doctor.
——How long has his father ________London?——For two weeks.
This kind of CD-ROM is very popular. Why not buy one before it___________?A. comes out B is come out C. is sold out D. sells out