Only when I left my parents for Italy __________how much I loved them.
32. Buses have routes. They ________ and ________ people at different places on the routes.
31. Nobody believed his reason for being absent from the class ______ he had to meet his uncle at the airport.
30. People ran out __________ as fire tore through the building.
28. The people had to _______ the new rulers when they lost the war.
27. People have become aware ______the fact that carbon dioxide, poison to the environment, contributes_____ air pollution.