She has a beautiful voice, which ________ a nightingale.

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The teacher told me that the students I wanted to see could be seen ________ football on the playground.

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Leaves ________ the trees and flying about in the autumn wind.

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They are such interesting books ________ students like reading.

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It was ________ that every one went out for a summer holiday.

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Jack has ________Mary in the town ________ nine years ago.

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What do you think ________ to help us?

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You haven't said a word about my new coat, Tom. Do you like it?

I'm sorry I ________ anything about it sooner.

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I often hear the old lady ________ in the next room. Last night while I was reading in bed, I heard her ________ badly.

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Everyone knows that coal ________ electricity for agriculture and industry.

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