问题
选择题
My uncle ________ a worker, but now he _______in an office.
A．is, was
B．used to, is working
C．use to be, works
D．used to be, works
答案
答案：D
题目分析：句意：我的叔叔过去是个工人，但是现在他在一个办公室工作。be used to doing sth 习惯于做……，used to do sth,过去常常做某事。now现在进行时态的标志，故选D。