The people _____ never say “impossible” will be successful.

Why are you so depressed? —I _____ my MP4 player on the bus

47. Three hundred firemen raced to thehotel after a smoke detector ______ the alarm soon after midnight.

k ______ building supplies to construct theseenergy-saving houses. It took brains, too.

Mr. Hu, can you tell us how to learn swimming well—Sure. But remember we can learn nothing well _______ hard work.