the reason for it is还是the reason for this is?

the reason for it is还是the reason for this is? it is because of the reason that I am tiredit is for the reason that i am tiredwhich is right It's for that reason that reason这里的for能否换成it's because of that reason谢谢，但是that reason也是短语啊？原句是it's for that reason that the language of the USA is english christmas is the reason for the It is___that reason that the languages of the U.S.A is English.A.on B.for the reason causing the problem is ...应该是the reason for 还是 the reason 后面接ing This is the reason ____I did it. The reason for it should be so is now very clear the reason people confuse it for a toad is that it is kind of round.round在这里什么意思 这句用reason for还是reason why?The reason for my dissatisfaction is that the book is a pirated one. 英语语法问题 改错the most immediate reason for it being common for customers to buy online is convenience 大神translate 以下文字Advertising is the art of persuasion for the reason that it aims at promotingAdvertising is the art of persuasion for the reason that it aims at promoting sales and gaining interests.The advertising information/message its 为什么没有the reason is because,只有it is because The reason for education is to pursue the truth, Is that the reason ___ you are for the plan. 这句英文语法有错么.进进.It is the reason for her being a special teacher 翻译句子：It will be seen that my reason for thinking that the earth is round are rather prdcarous 改错:the reason why he is always late for class