Question

 Mary used to _________ to work,  but she is used to ________to work now.

A. riding a bike, taking a bus          B. riding a bike, take a bus

C. ride a bike, taking a bus            D. ride a bike, take a bus

Answer 1

解析:C. 考查短语的辨析。used to 后接动词原形；be/get used to后接动名词形式。因此，选择C答案。