The words that we should pay attention to on the blackboard.A. being writtenB. are written

问题补充：

The words that we should pay attention to on the blackboard.

A. being written

B. are written

C. is writing

D. writing

答案：

A. being written

(答案→)B. are written

C. is writing

D. writing

解析：考察语态。句意：我们应该注意的那些句子写在黑板上了。结合语境可知本句主语为动作对象，故用被动语态。本句子的主语为the words 为复数形式，故选B。