地铁是大城市的特点。
Were there many subways or factories then?
当时有许多地铁和工厂吗？
There are new subways and new buildings.
有新的地铁和新的建筑。
It's very convenient to take subways.
乘地铁是很方便的。
B: It's very convenient to take subways.
乘地铁是很方便的。
It was too late for there to be any subways.
太晚了，不会有地铁了。
Oh, yes. I recommend the subways. They are very fast, faster than taxis.
很方便，我建议搭地下铁，很快，比出租车还快。
Subways and trains are running normally again.
地铁和火车恢复运行。
Subways and trains are running normally again.
地铁和火车恢复运行。
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