"I have a dream.and i will grab chance to finish it

"I have a dream.and i will grab chance to finish it Only then will I have a chance to achieve my dream. 请问Only then will I have a chance to achieve my dream.中为什么用倒装 only then _____ have a chance to do it.A.I will B .will I C I had know,if you have a dream give it a chance to happen,ou I will have a chance? only then will i have a chance of achieving my dream.为什么will i will seize the chance and work hard to achieve my dream th 英语填空,I have a dream:It is to _____ the university and work i Only then will I have a chance of achieving my dream Only then will I have a chance of achieving my dream是什么句型? Only then will I have a chance of acheving my dream