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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

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

发布时间：2025-12-14 03:25:19

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答案：D

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