I used to _____ very shy, but I _____ a

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问题选择题

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

答案

答案：D

判断题

OSN 9500设备的交叉连接、时钟处理在一块单板上完成。（）

判断题

新教师与专家型教师的区别主要在于二者的知识量不同。