20% of people on the earth do not have access ________ clean drinking water.

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He has made ________ progress in the past two years.

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We thought of selling this old funiture, but we have decided to ________ it. It might be valuable.

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I don’ t think we’ll be able to ________ any travel if we don’ t save our pennies.

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　　－What do you think of this matter?

　　－This is a matter of ________ importance. I think.

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After a year’s training, I’m sure he will ________ the target.

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Although many others were against it, he still ________ his opinion.

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My uncle went abroad last week. My parents and I went to the airport to ________.

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I’ve ________ my mind to be a nurse.

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If a pan of oil catches fire, ________ off the gas and cover the pan quickly.

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