Air pollution is ________ kind of pollution.

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When the land or the river was dirty in ________ place, man moved to ________ place.

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It's possible for us to ________ pollution.

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Would you ________ the trash bags?

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I waited there for almost an hour ________ my father arrived.

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They said Prof. Smith would ________ a lecture next Wednesday afternoon.

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We climbed a hill that is ________ in the city.

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The man looks ________ .

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Smoking is ________ to your health.

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I don't think what he did ________ much.

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