I have two pens. One is red and is blue.A. otherB. the otherC. anotherD. others

问题补充：

I have two pens. One is red, and is blue.

A. other

B. the other

C. another

D. others

答案：

A. other

(答案→)B. the other

C. another

D. others

解析：此题考查固定句型结构one…the other表示两者中一个…另一个。。。