In ancient China, people used to send smoke _____ to warn that the enemy were coming.
In ancient China, people used to send smoke _____ to warn that the enemy were coming.
A.signs
B.signals
C.symbols
D.marks
正确答案是B
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明：本文由翰林刷题小程序授权发布，如需转载请注明出处。