题目

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 答案：D 解析: 表示“被动、完成”用过去分词作定语。When we were young, every evening my brother and I____ stay at home waiting for our mother.A．wouldB．mightC．shouldD．could