题目内容
17.-What's in your school bag,Tommy?-There is _____useful book about animals.( )
| A. | a | B. | an | C. | the |
分析 翻译:--汤米,你的书包里有什么?
--有一本有用的关于动物的书.
解答 答案:A.表示数量"一"用不定冠词,这里是指"一本书",表泛指,useful以元音字母u开头,但第一音素是辅音,故用不定冠词a.故选A.
点评 a、an是不定冠词,意思是一个,指的可以是任何东西.根据后接单词词首音素的不同采用不同的形式.当词首音素为元音时,用an;当词首音素为辅音时,用a.
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