Thefirstsetoftextbooks________fort

发布时间：2020-07-27 09:43:48

The first set oftextbooks ________ for teaching English as a foreign language came out in the16th century.A.writtenB.had beenwrittenC.to bewrittenD.waswritten

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A解析the first set oftext books……in the 16th century说明书的写作是过去且为被动用过去分词。
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