She has mastered English grammar and a_ a large vocabulary without the help of a teacher.首字母填空,

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She has mastered English grammar and a_ a large vocabulary without the help of a teacher.首字母填空,
She has mastered English grammar and a_ a large vocabulary without the help of a teacher.
首字母填空,

She has mastered English grammar and a_ a large vocabulary without the help of a teacher.首字母填空,
acquaints
她在没有老师的帮助下,精通了英语语法并掌握了大量的词汇.

also

obtain包含着“努力”、“希望”或“决意”去获得某物的意思。 The She has mastered English grammar and acquired a large vocabulary without

应该是acquainted ,和master是同位的,意思是 在没有任何老师的帮助下,她了解并掌握了英语语法和大量的词汇,希望能帮到你啊