many times, he finally understood itA. TaughtB. TeachingC. Having taughtD. Having been t

发布时间：2020-08-16 14:22:09

     many times, he finally understood it．
A. Taught
B. Teaching
C. Having taught
D. Having been taught

网友回答

A. Taught
B. Teaching
C. Having taught
(答案→)D. Having been taught
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