There are many kinds of metals, ___.

There are many kinds of metals, ___.
A、each having its special properties
B、having its special properties
C、one has its special properties
D、each has its special properties
【正确答案】：A
【题目解析】：本句考察独立主格结构。B没有主语；逗号不能连接两个独立完整的句子，因此排除C，D；只能选A。句意为“金属有很多种，每一种都有它的特性。