◎ 题干

— Sorry,  Professor Smith. I didn't finish the assignment (作业, 功课) yesterday.  
— Oh, you____have done it as  yesterday was the deadline (最后期限).   

[     ]
A. must    
B. mustn't    
C. should    
D. shouldn't
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Sorry,ProfessorSmith. I didn't finish the assignment (作业, 功课) yesterday.— Oh, you____have done it asyesterday was the deadline (最后期限).[ ]A. mustB.…”主要考查了你对  【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。