单项选择题

The main purpose of this passage is to tell us ______.

A．the origin of adult education
B．the forms of adult education
C．the development of adult education
D．the significance of adult education

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According to the author, the war in Northern Ireland is not for religious reasons, but for the ______.

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Had he kept an eye on the business, ______ (他的公司肯定会度过危机).