问题补充：
The factory in the newspaper that they had some old machines for sale.
A. selected
B. solved
C. designed
D. advertised
答案：
A. selected
B. solved
C. designed
(答案→)D. advertised
解析：考查单词意思和分词做后置定语，selected意思“选择”solved意思“解决”，designed意思“设计”，advertised意思“做广告”，分词做后置定语，如果名词和动词是主谓关系，用现在分词做后置定语；如果名词和动词是动宾关系，用过去分词做后置定语，句子意思“在报纸上被做广告的工厂有许多旧机器出售”，所以选D
