◎ 题干
Last year, I _______ ride a bike, but now I _______. I go to school by bike now.
[     ]
A. couldn't, can  
B. could,can't  
C. couldn't, could  
D. couldn't, can't
◎ 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“Last year, I _______ ride a bike, but now I _______. I go to school by bike now.[ ]A. couldn't, can B. could,can't C. couldn't, couldD. couldn't, can'…”主要考查了你对  【一般过去时】  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。