在车削工件时，为什么要把工件夹紧顶牢？
参考答案：
防止工件被甩出，碰伤人员。
他的工作很积极，曾经荣获先进生产者。
—Hey! Don’t you remember me?
—Wow! Mary? You _______ curly hair. But now you have straight hair.
A. used to have B. were used to have C. are used to having
