4654The author wrote this text 查看材料A.to discover senten9090

The author wrote this text 查看材料 A.to discover sentence patterns and grammatical rules B.to expand vocabulary C.to use the target language D.to encourage unsuccessful language learners to learn independently， actively and purposefully E.from clues F.to say strange things 请帮忙给出正确答案和分析，谢谢！