问题
选择题
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, could
D. couldn't, can't
答案
答案：A
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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：A