I don't skate now, but I ________ when I was a kid.
A.used to
B.am used to it
C.used
D.used to do
网友回答
A解析used to do表示“过去常常干某事”，be/get/bee used to doing表示“习惯于干某事”，be used to do sth.可被视作use的被动态，表示“被用来干某事”，used to的简略回答要保留to，后面动词可省去，D项要说I used to (do so).