That is just ______ they are mistaken. A.when                             B.whatC.where                            D.which 为什么选C,B不选A或者B

问题描述:

That is just ______ they are mistaken.
 A.when                             B.whatC.where                            D.which 为什么选C,B不选A或者B

C.where的
这就是他们出错误的地方.where引导表语从句,表示地点.