摘要:( )--Have you ever read an e-book? -- . A. Yes , I do B. Yes , I have C. Yes , I did 答案:B 解题点拨:现在完成时由助动词have(has)+动词过去分词构成.其一般疑问句的肯.否定回答分别为Yes.主语+have(has)/No.主语+have(has) not.

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