为什么是What is this 而不是This is what?

为什么是What is this 而不是This is what? what colour is that dog?为什么是that而不是this 求解tell me what kind of bird this is?为什么是this is而不是is this? itis D的问句为什么是what is it而不是what is this 为什么是 what a sunny day it is 而不是how what is going on with this work 为什么是what , 为什么是what color is it?而不是what is color is it（英语）急 为什么是what great fun it is!而不是what a great fun it is! 为什么是 i dont kown what is wrong 而不是 what wrong is what do you think is it?为什么是is it而不是it is Is what he said really true?为什么是 what 而不是that? 为什么是what is she doing for vacation.而不是what does she do for vacation ()the old woman is in!为什么是 what good health而不是 what a good health呢? 为什么是It is imperative that this mission not fail.而不是It is imperative that this mission don't fail. This is the magazine _____ I copied the paragraph.为什么是from which 而不是from that This is the first time…为什么是现在完成时?而不是一般现在时? what's your favorite subject?为什么是is your而不是are you What's the chance of there being a storm tomorrow?为什么是“being”,而不是“is”?