16. He had already learned the news. I ______ the trouble to phone him about it.
A．needn't have taken
B．could have taken
C．should have taken
D．mustn't have taken
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◎ 解析
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◎ 知识点
根据n多题专家分析，试题“16. He had already learned the news. I ______ the trouble to phone him about it.A．needn't have taken B．could have takenC．should have takenD．mustn't have tak…”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。
◎ 相似题
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