52单词网 > 高中英语 > 高中英语题库 > scores of times , but he still couldn't understand it.A.Having explainedB.Having

scores of times , but he still couldn't understand it.A.Having explainedB.Having

来源:网络 时间:
scores of times , but he still couldn't understand it.A.Having explainedB.Having

________ 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

试题答案

D