◎ 题干
—Can I watch TV this afternoon, Mum?
—Yes, but ______ you have to finish your homework.

A. first  
B. once  
C. again  
D. ever
◎ 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“—Can I watch TV this afternoon, Mum?—Yes, but ______ you have to finish your homework.[ ]A. first B. once C. again D. ever…”主要考查了你对  【序数词】  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。