A-A+
Which is true about words？A．They are used to e
问题详情
Which is true about words？
A．They are used to express thoughts only.
B．They can be spoken, but can not be written down.
C．They are simply sounds.
D．They are not completely known to the world.请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
解析：文章第一段的第一句"Howmenfirstlearnttoinventwordsisunknown；inotherwords，theoriginoflanguageisamystery．"与[D]选项说法一致，为正确答案。
