I have two pens .One is red ,( )is black .

问题描述:

I have two pens .One is red ,( )is black .
A Other B the other C another D others
解释并说明理由

选B
我有两只笔,一只是红的,另一只是黑的.
one,the other就是共两只.其他都是更多的意思.