题目内容
Doing exercise for _________ hour every day is good for our health.
| A．/ | B．a | C．the | D．an |
D
解析试题分析: 句意：每天锻炼一个小时对我们的健康有好处。不定冠词a/an泛指某一类事物，指数量“1”，a用于辅音音标前，an用于元音音标前；定冠词the特指某类事物。根据语境可知是数量“1”小时，hour小时，字母h不发音，第一个音标为元音，故选D
考点：考查冠词。
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