Up to now, no one has been able to find an answer ________ the difficult problem.

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Of all the boys, Bill spent ________ time and made ________ mistakes.

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Which do you think tastes ________, meat, fish or chicken?

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The teacher ________ her voice so that everyone could hear her clearly.

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I asked Tim and Bob to my house for dinner, but ________ of them came.

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The books on this shelf are ________ than ________ on that one.

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I have many hobbies, ________, I like collecting stamps and listening to pop music.

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Pluto is the ________ planet from the sun.

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Computers are becoming ________ in our daily life.

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