英语,在某种特定的情况下我不知道到底是用to for还是of比如i cannot find the answer to

find the subway answer 是填OF,WITH,TO,FOR the question 英语中几个介词的区别有几个介词比较迷糊,about for of to with不知道什么情况下用,感觉一用这些就迷糊, 帮我翻译下句子...I cannot imagine, not for you to pass the time. the answer to the question 还是 answer of answer Find the answer (.)the question,please.A.of B.to C.for 疑惑, who is the luck man for you?I really want to find the answer I answer to him还是I answer for him? 如何在判断一个句子中的“to”是介词还是不定式(在不知道它后面跟的动词是原形还是“ing”的情况下)? I find ( )easy to answer the question.填 it 还是 it's 到底是Dear Mr/Mrs,还是Dear Mr/Ms?在不知道对方性别的情况下 英语语法：the answer _____ the question介词填of还是to还是for? 英语翻译在不知道是男还是女的情况下“他”用he 还是she