为什么是where are they.不是them?

为什么是where are they.不是them? 他们来自哪里?Where do they come from?为什么是where do 而不是where are Where are they going to?这里的to为什么是不用的Where are they going to?答案上说应该是：Where are they going?为什么这里to不用? where they are 和where are they where are they where are they where are they where are they where are they all where are they takeing Where are () (they )keys under no circumstances (are they to borrow )our car tomorrow?请问为什么是这个答案,为什么不能用别的A:they are borrowing ,B: are they to borrow ,C: they will borrow ,D:could they be borrowing.求 There are many cases () people get cheated in their life.这里面为什么是 where 而不可以填which where are they怎么回答 Where are they?的意思 Where are they going tomorrow? I wonder where they are where do you think you are为什么是宾语从句