英语语法分析

Which day is Chinese Arbor Day?

中国的植树节是哪一天？

What do people often do on Chinese Arbor Day?

人们常常在中国植树节这一天做什么？

As years go by, Arbor Day has become one of the major holidays in America.

随着时间流逝，植树节已经成为美国的主要节日之一。