---Did you get there by bike?- No, I took taxi. A. a, aB. /,aC. the , theD. a , the

---Did you get there by bike?
--- No, I took taxi.
A. a, a
B. /,a
C. the , the
D. a , the

A. a, a(答案→)B. /,aC. the , theD. a , the解析：句意：你骑自行车到那里吗？-不，我乘出租车。乘坐交通工具分为两类，介词类和动词类。by 直接加交通工具，on/in+冠词（人称代词）+交通工具，on foot步行。take+…+交通工具，或用动词来表达：walk,run,ride,fly,等。故选A。

感谢回答