这题为什么要用there　be句型？还有为什么要倒装呢
------You're bood a four o'clock flight? ------What chance_______of taking an earlier plane? A.there is B.it is C.there is it D.is there
你看啊，要是我问what your name is?不也就是说what is your name吗，是吧？ 所以这儿也一样，你把there is 整体看作 “有” 这一动词，有什么机会 what “there is ”the chance，=what chance there is,这样理解吧。