A;Helen,you look so happy today.B;Well,I've got__A in my history test

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A;Helen,you look so happy today.B;Well,I've got__A in my history test
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A;Helen,you look so happy today.B;Well,I've got__A in my history test
A;Helen,you look so happy today.B;Well,I've got__A in my history test

A;Helen,you look so happy today.B;Well,I've got__A in my history test
首先,因为冠词a只用于辅音音标前,冠词an只用于元音音标前.
而A的音标是元音/ei/,所以肯定不能选B.a
然后,不定冠词an用于泛指,而定冠词the则用于特指.
这里的A表示的是一种等级,翻译为:我在历史考试中得了一个A.是泛指的,并没有特指的含义,因此选A.an

选A,我得了一个A的意思

an
我历史得了个A 排除the
A元音 所以用an