Luggage may not be brought into the building ________ a guard has checked it first.
.—What are you reading,Jim?—I’m not really reading,just________the pages.
We are looking forward to________a chance to watch the opening ceremony of the London 2012 Olympic Games.
The letter he had been looking forward to________at last this morning.
Though Tom was impolite to the new teacher,she________him his rudeness.
_______not to miss the flight at 15∶20,the manager set out for the airport in a hurry.