—Why didn’t Susan come to school? —I don’t know. She____ ill.
A．could be
B．may have been
C．might
D．must have 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“—Why didn’t Susan come to school? —I don’t know. She____ ill.A．could beB．may have beenC．mightD．must have been…”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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