Mr. Wang drive to work, but now he there by bike to keep healthy.A. used to; is used to go

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(答案→)A. used to; is used to going
B. used to; is used to go
C. was used to; is used to going
D. was used to; is used to go
解析：be used to do表示“ 被用来做某事”，be used to doing表示“习惯于做某事”，used to表示“过去常常”。根据题干，本句的意思是“王先生过去常常开车上班，但是现在为了保持健康，他习惯了骑自行车去上班。”所以本题选A。