---- I can’t get through to the general manager’s office anyhow. ---- The line is busy. Someone ___________ the telephone.
A．can have used
B．can use
C．must have used
D．must be using
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◎ 解析
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◎ 知识点
根据n多题专家分析，试题“---- I can’t get through to the general manager’s office anyhow. ---- The line is busy. Someone ___________ the telephone.A．can have used B．can useC．must ha…”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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