◎ 题干
—All of us had a good time in the picnic last Sunday. Pity you weren't there.  
—I really ________ come but I was looking after my mother in hospital.  
[     ]
A. must  
B. ought to
C. need have  
D. should have
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—All of us had a good time in the picnic last Sunday.Pity you weren't there.—I really ________ come but I was looking after my mother in hospital.[ ]A. must…”主要考查了你对  【情态动词】【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。