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【题目】The doctor asked me to take the medicine before meals, three at time.

A.anB.aC./D.the

【答案】B

【解析】

句意:医生让我饭前吃药,一次三粒。

考查冠词。an不定冠词,用于元音音素前;a不定冠词,用于辅音音素前;C. /零冠词;D. the定冠词。结合句意可知,此空是一次三粒的意思,根据空后单词time是以辅音音素开头的单词,此空应填不定冠词a,故选B

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