Today Chinese people can enjoy longer holidays,such as the Spring Festival and National Day.They have more time to trave
问题描述：
Today Chinese people can enjoy longer holidays,such as the Spring Festival and National Day.They have more time to travel.Rising incomes also make____possible for ordinary Chinese people to travel abroad.这里为什么要填写it,那that为什么不可以呢?
答
it用作形式宾语,是一种特定的用法,为了避免句子头重脚轻,真正的宾语是后面的to travel abroad
同样的用法还有it作形式主语
It is important to learn English well.
真正的主语是To learn English well