7、The strata movement and the ground surface subsidence caused by underground mining are serious underground engineering problems.
11、Now, the people in Xuzhou are richer than before, so most of people go to work by bus or by underground.
3、I always travel by underground.
8、I go to school on foot, then by underground, then by bus, then on foot.
1、Babies go by underground.
6、They plan to visit Amy's aunt and decide to go there by underground, but cannot find the nearest underground station.
2、They can go by underground.
10、Now, the people in Xuzhou are richer than before, so most of people goto work by bus or by underground.
9、The high-voltage electric power is generally transmitted by underground cables in urban.
12、When the Dome is closed, air renovation will be provided by underground channels fed by wind cowls installed on the external perimeter. Air movement will be mainly wind-driven.
5、Eddie goes to school by taxi.I go by underground.
4、They are connected by underground passageway.
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