The fastest way to travel in a city is by subway.In many big cities,there are usually more than one subway lines.___ to travel by subway?Here is something to ___ before you travel by subway.A.Where B,How C.What D.WhyA.think B.know C.get into D.get on
问题描述：
The fastest way to travel in a city is by subway.In many big cities,there are usually more than one subway lines.___ to travel by subway?Here is something to ___ before you travel by subway.
A.Where B,How C.What D.Why
A.think B.know C.get into D.get on
答
BB