典型例题
1） The first textbook ___ for teaching English as a foreign language came out in the 16th century.
A. have written B. to be written C. being written D. written
答案D. 书与写作是被动关系，应用过去分词做定语表被动，相当于定语从句 which was written
2）What's the language ____ in Germany?
A. speaking B. spoken C. be spoken D. to speak
答案B. 主语language与谓语动词之间有被动的含义。spoken，在句中作定语，修饰主语language, spoken 与 language有被动关系。该句可以理解为：What\'s the language （which is） spoken in German?
