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Panic ________ off across the whole country. (set)

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By the time she went outside, the bus ________ already________. (go)

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The young people enjoy ________ Jackson's songs very much. (listen to)

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My mother ________ clothes when I came back last night. (wash)

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By the time I got home, I realized that I ________ my umbrella in the classroom. (leave)

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I ________ the problem when class was over. (not understand)

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I went to Nick's house, but he ________ out. (go)

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After he ________ his work he went home at once. (finish)

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We ________ three thousand English words by the end of last term. (learn)

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By six o'clock they _________ for ten hours. (work)