the masses beneath them are left behind. …
it is the masses beneath them that are left behind.
变化
It is/was… that/
who…
… it was not until the 1940s that a majority of states made women eligible for jury duty
It was only after “toddler”became a common shoppers’ term that it evolved into a broadly accepted developmental stage.
判断是否强调句
还原法：
强调句基本结构去掉是否能组成一个完整的句子，如果可以就是强调句
It is men, not women, who report being happier at home than at work.
排除法:强调句不能强调形容词和动词
It is quite possible that the homework helped.
