－Why didn’t Susan come to see us yesterday as she promised?－______.A．She must be busyB．She might have been freeC．She must have been busyD．She can’t be free-高中英语-n多题

◎ 题干

－Why didn’t Susan come to see us yesterday as she promised?
－______.

A．She must be busy	B．She might have been free
C．She must have been busy	D．She can’t be free

◎ 答案

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“－Why didn’t Susan come to see us yesterday as she promised?－______.A．She must be busyB．She might have been freeC．She must have been busyD．She can’t be free…”主要考查了你对【虚拟语气】，【情态动词】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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