a long answer ( ) that question

Well, that's a vevy difficult question to answer? Please answer a question Anyone can answer that question,---------? ______ hard for me to answer that question.A.That's B.This i Give them the answer ____ that question. answer the question that you asked me you'd better answer that question in a lond（v ） This is a question that only "金尚峰'could answer this is so difficult a question that none of us can answer i I find____not easy to answer this question in English.A.that The question is ( ) that nobody can answer it.A.too diffcult it was so easy a question that everyone could answer it.怎么判断