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Are you satisfied with the way which teachers treat their students?

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Advertisements usually include bad languages for children．

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I am concerning about our company’s development．

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Greek is much too harder to learn for middle school students．

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What do you usually argue with your parents?

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－Who is in the cave now?

－None．

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You shouldn’t attend such a meaningless meeting; it was only a waste of time．

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This is the best meal that I have never eaten．

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Mr．Smith cannot afford buying his son a piano．

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All of the meals served in this restaurant are the highest standards．