问题

Mr. Wang _______drive to work, but now he _______there by bike to keep healthy.
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;
B:used to; is used to go
C:was used to; is used to going
D:was used to; is used to go;
正确答案是: