◎ 题干
She ________ hum pieces of music at the age of four. She is a talented singer.
[     ]
A. can  
B. could  
C. must  
D. should
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“She ________ hum pieces of music at the age of four. She is a talented singer. [ ]A. can B. could C. must D. should …”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。