In the world where ET comes from...定语从句中的关系词为什么用where而不用that(which)?

Where __did you go A.in world B.in the world C.on world D.on the world 选什么, where is the most beautiful place in the world? Where is the biggest city in the world?英语智力题 Where is the biggest city in the world? Where does afternoon always come before morning in the world Where does afternoon always come before morning in the world? Where does afternoon come before morning in the world? Where does afternoon come before morning in the world? where in the world does afternoon come before morning where in the world were you when i need you. where does afternoon comes before morning in the world no one in the world even kenw where i was I am no idea where in the world i am Where is the Statue of liberty? It's one of the places world ______ in the world by the time she is twenty she___almost every where in the world! ( )______will the world be different in the future?A.What B.How C.Where D.when Which mountain is the hignest in the world?Where is it?How high is it? where did the World Expo take place?It is in Shanghai_a new Disney World.AwhereBthatCwhichDwhen选什么?要有思路