1.__________(tell) many times,he still couldn't understand.

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1.__________(tell) many times,he still couldn't understand.
A.Having been told .B.Told
C.He was told D.Though he had been told
为什么选A,而不选B?B项在什么情况下可以用?与A项又有什么区别?

都是被动,但是A 选项表示动作发生在后面的动作之前（have been done 强调动作的先后）

1.__________(tell) many times,he still couldn't understand. ____ many times but he still couldn't understand it 1.___many times,but he still couldn't understand it. 1.（）many times,he couldn't understand it. he had been told many times but he still couldn't understand _____scores of times,but he still couldn't understand it. __many times,but he still couldn't understand ________many times,but he still couldn't understand it. ( ) many times,but he still couldn't remember . 高中英语单选几道.1.________A_ many times,but he still couldn’t under ___ many times but he still could not understand it.(tell) ____ many times ,he still couldn't remember it.求详解