Tony ____ for the company as an engineer for twodecades Now he teaches mechanics m Peking University

_____ that he picked up his uncle at the airport—It was at 6:00 in the afternoon _____ he got off work.

Someone is singing next door. Is it Amy—It ______ be her. She is giving a performance at the theatre now.

ain ___________ obvious the moment Iwalked into the room, for the first man I met asked me pitifully:"Are you feeling all right"

That must have been a long trip.——-Yeah, it______ us a whole week to get there