people in ancient times built the great wall to_____enemies_____getting into our country
问题描述:
people in ancient times built the great wall to_____enemies_____getting into our country
Aprovide,with Bprevent,from Cprotect,against Dproduce,and
答
B
prevent sth/sb from doing sth
古代人建造长城去防止敌人进入我们的国家