The science of medicine, ________ progress has been very rapid recently, is perhaps the most important of all the sciences.

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We hope that the measures to control prices, ________ are taken by the government, will work.

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What should the people do to solve the food problem if they live in hilly areas ________ is hard to grow crop?

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I have never seen such a beautiful movie“Hero”________ is directed by Zhang Yimou.

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She is very good at dance, ________ everybody knows.

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Who was the gray-haired old woman ________ at yesterday meeting?

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All ________ is needed is a supply of oil.

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Finally, the thief handed in everything ________ be had stolen to the police.

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There is a mountain ________ the top is always covered with snow.

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Let's go to the cinema together. Meet at the place ________ you did yesterday.

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