高等继续教育 / 大学英语语法
正确率：100%
题型描述: 单选题
Closed plane figures like the square or the equilateral triangle can be grouped into a class ＿＿＿＿＿＿＿＿ polygons.
A.called
B.to call
C.call as
D.is called
Closed plane figures like the square or the equilateral triangle can be grouped into a class ＿＿＿＿＿＿＿＿ polygons.
A.called
B.to call
C.call as
D.is called
参考答案：