― Isn’t it hard to drive downtown to work all the time?

―Yes, and that’s why I ______   to work by bicycle.      

A. have gone   B. have been going      C. was going      D. will have gone

―Isn’t it hard to drive downtown to work all the time?

―Yes, and that’s why I ______ to work by train.

A. have gone                   B. have been going

C. was going                   D. will have gone