单项选择题

Questions 22-25 are based on a talk about salt. When did salt first begin to be used by man

A．Over 3,000 years ago.
B．In the 18th century.
C．We don’t know.
D．In the 16th century.

<上一题目录下一题>

热门试题

单项选择题

单项选择题

Questions 22-25 are based on a talk about salt. When did salt first begin to be used by man 您的浏览器不支持 audio 元素。