问题补充:
Doing exercise for hour every day is good for our health.
A. /
B. a
C. the
D. an
答案:
A. /
B. a
C. the
(答案→)D. an
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
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