单选题：Ifheadaches only occur at night, lack of fresh air is often

题目内容：

Ifheadaches only occur at night, lack of fresh air is often the cause. A．deliver
B．fall
C．happen
D．arrive

参考答案：

答案解析：

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回答题：Entertaining Guests in Today's BritainBritons are increasingly entertaining

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Paragraph 2__________A．NewDefinitions Of the OId Man B．ChangingConcept of the Ol

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Abouta quarter of the workers are jobless because of the economic crisis．A．third

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