题目

—Excuse me. I'm looking for Be the Best of Yourself. —Sorry. The book you ask for______ out. A. is selling     B. is sold    C. was selling     D. will be sold 答案：【答案】B 【解析】考查动词的语态。主语the book和动词sell构成被动关系，又时态为一般现在时，因此用一般现在时的被动语态。答语句意“对不起，你要的书已售完”。故选B。

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