语法练习5-39Childeren have always learned their language simply by hearing it_____A.speaking B.speak C.spoken D.speaks

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语法练习5-39Childerenhavealwayslearnedtheirlanguagesimplybyhearingit_____A.speakingB.speakC.spokenD.spea

语法练习5-39Childeren have always learned their language simply by hearing it_____A.speaking B.speak C.spoken D.speaks
语法练习5-39
Childeren have always learned their language simply by hearing it_____
A.speaking B.speak C.spoken D.speaks

语法练习5-39Childeren have always learned their language simply by hearing it_____A.speaking B.speak C.spoken D.speaks
C
it指代language,spoken做it的结果补语.
而且由于语言是“被”说出来的,所以用被动语态啊.