A:禅让制
B:分封制
C:世袭制
D:郡县制
Do you see the sea? The sea is blue,and it is very large(大的).The sea looks beautiful in a sunny day. If(如果)you swim,in the sea,you know that the water is salty(咸的).Do you like the sea?
这以后发生了什么故事呢?请你把它写下来。