Sam has a bike. He ______ it to school every day.

Why do you look so worried? — My computer broke down and my essay _____ since

Only when the teacher walked into the classroom ________ that she had left the speech note at home.

Mr. Smith, _______ of the ______ speech, started toread a novel.

RestaurantsineverycornerofChengdunotonlyprovidejobopportunitiesbut________lotsoftaxesaswell.