◎ 题干
—Did you return Helen's call?  
—I didn't need to _________ I'll see her tomorrow.    
[     ]
A. though      
B. unless          
C. when          
D. because
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Did you return Helen's call? —I didn't need to _________ I'll see her tomorrow.[ ]A. though B. unlessC. whenD. because…”主要考查了你对  【从属连词】  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。