关于be based on用法的一道题目what are you mailing,mike?a te

发布时间:2021-02-18 14:47:10

关于be based on用法的一道题目what are you mailing,mike?a textbook

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选A is based on 被动形式
======以下答案可供参考======
供参考答案1:
Bbased on a new of teaching maths是分词短语,修饰a textbook
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