A.They are used to express feelings only.
B.They can not be written down.
C.They are simply sounds.
D.They are mysterious.
[单选题]How men first learnt to invent words is unknown; in other words, the origin
[单选题]How men first learnt to invent words is unknown; in other words, the origin
[单选题]How men first learnt to invent words is unknown; in other words, the origin
[单选题]How men first learnt to invent words is unknown; in other words, the origin
[单选题]How men first learnt to invent words is unknown; in other words, the origin
[单选题]How men first learnt to invent words is unknown; in other words, the origin
[单选题]How men first learnt to invent words is unknown; in other words, the origin
[单选题]How men first learnt to invent words is unknown; in other words, the origin
[单选题]How men first learnt to invent words is unknown; in other words, the origin
[单选题]How men first learnt to invent words is unknown; in other words, the origin