The first textbook 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：主要测试非谓语动词。过去分词作定语表被动、完成；而现在分词的被动式作定语，则表进行、被动。由句子可知此处textbook和write之间为被动关系。