The first text book,________ for teaching English as a foreign language,came out in the 16th century.
A.having writtenB.to be writtenC.being writtenD.written在线课程D
因为主语the first text book与come out之间是动宾关系,所以只能用被动语态,故排除A.又因为to be written表将来,being written表正在进行,都与后句中的在16世纪出版相矛盾,所以选written.written是过去分词,表示被动和完成.
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