The Fourth Element
　　Teacher: What are the four element of nature?
　　Student: Fire, air, earth, and... and ...
　　Teacher: And what? Just think it over, what do you wash your hands with?
　　Student: Soap!

第四元素
　　老师：自然界的四大元素是什么？
　　学生：火、气、和。。。和。。。
　　老师：和什么？想一想， 你用什么洗手的？
　　学生：肥皂。

NOTE
just think it over 好好想一想
what do you wash your hands with？ with表示用… what是with的宾语