there is no small wonder that they had so much troubleit is no small wonder that they had so much trouble这两 个哪 一个对呀要原因
问题描述：
there is no small wonder that they had so much trouble
it is no small wonder that they had so much trouble
这两 个哪 一个对呀
要原因
答
It's no wonder that : 难怪……
it is no small wonder that they had so much trouble 对
答
it is no small wonder that they had so much trouble 对
是 it 开头的 主语从句
为了防止句子头重脚轻，通常把形式主语it放在主语位置，真正主语搁置于句末
答
it is no small wonder that they had so much trouble 对
因为
It's no wonder that +从句
是一种固定句型,意思是：难怪……
…… 的内容由从句给出
答
可以简练地说：
No wonder they had so much trouble.