The first textbooks for teaching English as a foreign language came out in the 1

　 The first textbooks _____ for teaching English as a foreign language came out in　the 16th century.

A. being heardB. to be written  C. being written　D. written

试题答案

D

解析:

过去分词作定语表示动作是被动的，而且已经完成。