◎ 题干
I used to _____ very shy, but I _____ a lot these years.
[     ]
A. am; changed
B. be; changed
C. am; have changed
D. be; have changed
◎ 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“I used to _____ very shy, but I _____ a lot these years. [ ]A. am; changed B. be; changed C. am; have changed D. be; have changed …”主要考查了你对  【动词短语】【现在完成时】  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。