The first textbooks for teaching English as a foreign language came out in the 16th century.
A. having written
B. to be written
C. being written
D. written
网友回答
A. having written
B. to be written
C. being written
(答案→)D. written
解析：单个过去分词作定语置于被修饰的名词前，过去分词短语作定语置于被修饰的名词后。过去分词作定语表示被动、完成的动作，而且被修饰的名词是过去分词动作的承受者。