请解释这句英文的语法It was that of the boa constrictor.
问题描述：
请解释这句英文的语法
It was that of the boa constrictor.
答
of the 去掉就是强调句
否则无语法可言
答
这句话是小王子里的吧.要跟前句一起理解的,that 指代picture.