Question

【题目】I _________ school on foot, but now I _________ so by bike.
A.used to go; used to doing
B.used; am used to do
C.used to going; am used to do
D.used to go; am used to doing

Answer 1

【答案】D
【解析】used to do sth 意为“过去常常做某事”，be used to doing sth意为“习惯于做某事”。句意是：我过去常步行上学，但是现在我习惯了骑自行车上学。根据句意选D。