In order to enter the PE exam, now we spend at _____ least half _____hour a day
题型：不详难度：来源：
In order to enter the PE exam, now we spend at _____ least half _____hour a day at school. | A．a; an | B．the ; a | C．不填；an | D．不填; a |
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答案
| C |
解析
试题分析：句意：为了通过体育考试，现在我们在学校一天最少花费半个小时的时间。前文为短语at least最好，至少。下文泛指任何一个小时，故用不定冠词，hour词首音素是元音，故用不定冠词an，选C。
点评：冠词是一种虚词，一般用于名词前面表示特指或者泛指某一个。冠词的应用都用一定规则，熟记这些规则是解题的关键。不定冠词用在名词前，表示泛指任何一个。定冠词用在名词前表示特指某一个。在专有名词及表示泛指的复数名词前一般不要冠词，叫做零冠词。需注意的是不定冠词的用法是看词首音素，不是看首字母，如：useful首字母是元音，但是词首音素时辅音，故不定冠词用a；hour首字母是辅音，但是词首音素是元音，故用冠词an。 |
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