The first set of textbooks__for teaching English as a foreig
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"the first set of textbooks written for TEFL"中用的是-ed分词作定语修饰the first set of textbooks,该句谓语是came out. 若想用D,则整个句子应改为the first set of textbooks带定语从句,下面是完整的句子:The first set of textbooks that was written for teaching English as a foreign language came out in the 16th century.

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