The words that we should pay attention to on the blackboard.
A. being written
B. are written
C. is writing
D. writing
网友回答
A. being written
(答案→)B. are written
C. is writing
D. writing
解析：考查动词时态。that we should pay attention to是定从，主句是The words on the blackboard，主语是复数，且和谓语是动宾关系，所以用被动语态。选B。