. — Flight 551 for Dalas ______. I must be off now. — Have a pleasant trip then.A．is being announcedB．has announcedC．was announcingD．had been announced-高中英语-魔方格

◎ 题干

. — Flight 551 for Dalas ______. I must be off now.
— Have a pleasant trip then.

A．is being announced

B．has announced

C．was announcing

D．had been announced

◎ 答案

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◎ 解析

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◎ 知识点

根据魔方格专家分析，试题“. — Flight 551 for Dalas ______. I must be off now. — Have a pleasant trip then.A．is being announcedB．has announcedC．was announcingD．had been announced…”主要考查了你对【一般现在时】，【将来进行时】，【过去完成进行时】，【过去将来时的被动语态】等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。

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