Ⅰ、 1、by subway
2、by plane
3、by taxi
4、on foot
5、by train
Ⅱ、4 3 2 1
Ⅲ、1、How do you go / come to the library? By bike?
Sometimes. but I usually go / come by taxi.
2、How do you go / come to the post office? By car?
Sometimes. but I usually go / come by subway.
3、How do you go / come to Haikou? By ship?
Sometimes. but I usually go / come by plane.