77. --- Have all the important letters been delivered at the first time? --- I’m sorry. _______ only 40% of them.A．It isB．They areC．There areD．It has been-高中英语-n多题

◎ 题干

77. --- Have all the important letters been delivered at the first time?
--- I’m sorry. _______ only 40% of them.

A．It is

B．They are

C．There are

D．It has been

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“77. --- Have all the important letters been delivered at the first time? --- I’m sorry. _______ only 40% of them.A．It isB．They areC．There areD．It has been…”主要考查了你对【人称代词】，【相互代词】，【疑问代词】，【关系代词】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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