the reason is the rapid development of the economy.这句有没有错误啊?

what is the reason the reason causing the problem is ...应该是the reason for 还是 the reason 后面接ing christmas is the reason for the This is the reason ____I did it. the reason why...is that...造句 带汉译 Tiffany Alvord The Reason Is You歌词 That,is,the,reason,求汉语 【the reason is that +句子】 与 【the reason is why +句子】的区别? the reason for it is还是the reason for this is? no matter what the reason is .no matter what is the reason.哪一种说法正确? 这句用reason for还是reason why?The reason for my dissatisfaction is that the book is a pirated one. The reason for education is to pursue the truth, 改错what is the reason of the fire? Is that the reason ___ you are for the plan. the ra-----here is little,so the air is very dry. the reason that和the reason why the reason why与 the reason the very reason是什么意思the very reason