He_____late into the night, but now he goes to bed early due to health reasons.
A、used to work
B、used to working
C、is used to working
D、is used to work
【正确答案】：A
【题目解析】：考查固定短语。句意：以前他经常加班到深夜，但现在因为身体原因，他早早就睡了。used to do sth.意为“过去常常做某事”，be used to doing sth.意为“习惯做某事”。故选A。
