我们城市的邮政服务非常可靠。

The postal ___service in our city is very reliable.

下周我们将运营高峰时段的正常火车服务。

We will operate normal rush-hour train ___service next week.

每二十分钟有一班巴士服务开往机场。

There is bus ___service to the airport every twenty minutes.