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【題目】How long does a snake sleep? It ______ for eighteen ______ a day.

A. sleep, hour

B. sleeps, hours

C. slept, hours

【答案】B

【解析】

試題分析：句意：蛇睡多長時間？它一天睡18個小時。根據(jù)How long does a snake sleep?可知此處用一般現(xiàn)在時，主語it是第三人稱單數(shù)形式，故此處的謂語用第三人稱單數(shù)形式sleeps。有數(shù)詞eighteen修飾，故此處用復數(shù)名詞hours。故選B。

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