我通常乘地铁上班。

I usually take ___the ___tube to work.

对于首次来访者，乘坐地铁可能令人困惑。

Navigating ___the ___Tube can be confusing for first-time visitors.

高峰时段，地铁非常繁忙。

During peak times, ___the ___Tube gets very busy.