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The word 'diurnal' (in Paragraph 3) is closest in meaning to ______.
A.day-and-night's
B.everyday
C.two days'
D.yearly

A.A.day-and-night's
B.everyday
C.two

【参考答案】

B
解析：第四自然段中的diurnal与everyday的意思最接近。diurnal前面的daily起了暗示作用......

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