介绍自己的变化与进步 — 英语选择题
题目
成长卡上写着：两年前我不会骑自行车，现在会了。哪句话能准确介绍这个变化？A. I couldn't ride a bike two years ago, but I can now. B. I could ride a bike two years ago, but I can't now. C. I can't ride a bike two years ago, but I could now. D. I couldn't ride a bike two years ago, and I can't now.