问题补充:
These words that we should pay attention to on the blackboard.
A. being written
B. are writing
C. are written
D. writing
答案:
A. being written
B. are writing
(答案→)C. are written
D. writing
解析:句意:我们应该注意的单词写在了黑板上。动作的承受者作主语,用被动语态。其结构是,主语+be+done,单词和写之间有被动关系,故选C。