This problem is said _______ three times, but he still can’t understand it.A．to have been explainingB．to have explainedC．having been explainedD．to have been ex-高中英语-n多题

◎ 题干

This problem is said _______ three times, but he still can’t understand it.

A．to have been explaining	B．to have explained
C．having been explained	D．to have been explained

◎ 答案

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“This problem is said _______ three times, but he still can’t understand it.A．to have been explainingB．to have explainedC．having been explainedD．to have been ex…”主要考查了你对【现在分词的被动式】，【现在分词】，【不定式的被动式】，【过去分词】等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。

◎ 相似题

与“This problem is said _______ three times, but he still can’t understand it.A．to have been explainingB．to have explainedC．having been explainedD．to have been ex”考查相似的试题有：

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