I ______ go to work on foot because I ride a bike every day.

  A. usually         B. never           C. often            D. sometimes

— How do you often go to work?

—I ________ go to work by bus, but now on foot.

A. used to          B. am used to            C. am used for            D. use to

— How do you often go to work?

—I ________go to work by car. But now on foot.

A. used to              B. am used to               C. am used for