摘要： over and over again, but he still couldn't understand. A.Having explained B.Having been explained C.Explaining D.It had been explained
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______ over and over again, but he still couldn't understand.
A.Having explained B.Having been explained
C.Explaining D.It had been explained
查看习题详情和答案>>______ over and over again, but he still couldn't understand.
|
A．Having explained |
B．Having been explained |
|
C．Explaining |
D．It had been explained |
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