It is generally agreed that the first true cities appeared about 5,000 years ago

It is generally agreed that the first true cities appeared about 5,000 years ago in the food-produci

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Which of the following words does not contain a fricative?

Which of the following words does not contain a fricative?

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Drunken driving, sometimes called America's socially accepted form of murder, ha

Drunken driving, sometimes called America's socially accepted form of murder, has become a national

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English course objectives at the stage of basic education include five aspects,

English course objectives at the stage of basic education include five aspects, that is, students' l

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When students are doing activities, the teacher walks around and provides help i

When students are doing activities, the teacher walks around and provides help if necessary, both in

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