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(2006年徐州)

Thanks ________ the Great Green Wall, the land produces more crops.

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You can play computer games sometimes, but you mustn't ________ too much time on it.

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(2006年重慶)

Your classroom is so dirty. Everyone should keep it ________.

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(2006年合肥)

--- Don't you think your radio is too noisy?

--- Yeah, I'll go and ask her to ________.

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We shall visit the Science Museum ________ next week.

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(2007年重慶)

Remember to ________ the lights when you leave your classroom.

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The weather turns ________ and the wind blows ________.

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The little girl often looks ________ the window in class.

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________ our surprise, he bought 20 hamburgers.

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(2006年吉林省)

--- ________ do you help your mother do the housework?

--- Once a week.

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