There is no doubt ________ people ought to struggle against pollution.

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The facts have proved ________.

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The chair, one of ________ legs is broken, needs repairing.

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The man came up to a lonely cottage, ________ there a while, and then entered it with great interest.

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They usually have less money at the end of the month than ________ at the beginning.

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----How long has this bookshop been on business?

---- ________1982.

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The boy wanted to ride his bicycle in the street, but his mother told him ________.

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----Alice, why didn't you come yesterday?

----I________, but I had an unexpected visitor.

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----Nancy s not coming tonght.

----But she ________.

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Dr. Black comes from either Oxford or Cambridge, I can't remember ________.

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