--The buses give off a great deal of waste gas in the streets.

--Yes. But I'm sure something will be done to _______ air pollution.

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The farmers ________ a lot _______ the flood because it rained heavily.

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You can see the stars on a clear night, but in the daytime they are _____.

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Finding information in today's world is easy. The ______is how you can tell if the information you get is useful or not.

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Fitness is important in sport, but of at least ______importance are skills.

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Don't respond to any e-mails ______personal information, no matter how official they look.

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We want to rent a bus which can ______40 people for our trip to Beijing.

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SARS is spreading in our country, ______in Beijing. A lot of army doctors have been sent there ______to defeat it.

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The street is not in good order with rubbish ______everywhere.

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The power of ______is very great.

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