－we get knowledge ________ from books ________ from life.

－Yes, both are important.

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They ________ all their money, so they have to walk home.

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It is ________ difficult for us ________ climb up the mountain.

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The bridge is about ________ long.

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Martin looks so well. We've never seen him ________ so well before.

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－Would you like ________?

－Thank you, but I'm not thirsty.

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The new computers ________ the village school as presents last month.

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________ so much noise? It may wake up the baby.

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Have you find your ruler ________?

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He ran ________ to catch up with the others.

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