_____ scores of times , but he still couldn’t understand it ． A．Having explained B．Having been expla...
2023-01-19 13:56:11 103次 2010-2011学年山西省高三上学期期中考试英语卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
_____ scores
of times , but he still couldn’t understand it ．
A．Having
explained
B．Having been explained
C．Though it was
explained D．It was explained
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