题目内容


—What’s this in English? —It’s ____ eraser.
A．aB．an C．thatD．this
B

试题分析：根据题干可知eraser是以元音音素开头的单词，故表示泛指的时候，其前面选用不定冠词时要用an。
点评：冠词是一种虚词，在英语中只能和名词一起使用，分为不定冠词和定冠词，a用在辅音开头的单词前面，an用在元音开头的单词前面，定冠词the既可表示特指，也用于形容词最高级之前，序数词之前等
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