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高考◆英语◆山东省題庫下載題庫

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28. After Jack had sent some e-mails, he _______ working on his project.
(A)had started
(B)has started
(C)started
(D)starts

答案：C
難度： 非常簡單


28. After Jack had sent some e-mails, he..-阿摩線上測驗