◎ 题干
— Who did it sound like? Anybody you know?
— Well, perhaps Jeff. I ____ who was calling before he hung it up.
[     ]
A. must have asked
B. needn't have asked
C. couldn't have asked
D. should have asked
◎ 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“— Who did it sound like? Anybody you know? — Well, perhaps Jeff. I ____ who was calling before he hung it up. [ ]A. must have asked B. needn't have asked …”主要考查了你对  【虚拟语气】  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。