(1) many times, but he still couldn’t understand it. (2) many times, he has already known how to do it. A. Having been told B. Having told C. He had been told D. Though he had been told 查看更多

 

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(1)________ many times, but he still couldn’t understand it.

(2)________ many times, he has already known how to do it.

A.Having been told

B.Having told

C.He had been told

D.Though he had been told

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