单选题My teacher used to _

问题补充：

单选题Myteacherusedto_______abiketoschool,butnowheisusedto________acartowork.A.ride, drivingB.ride, driveC.riding, driveD.riding, driving

答案：

A解析used to do sth，表示过去常常做某事，be used to doing sth，故选A