根据短文内容，从下面方框中选择适当的词或词组填空。
less than; shortly after; used to; comfortable; brought into |
Have you ever taken a high-speed train—China Railway High-speed (CRH) Hexie Hao? It's clean， and fast， and it offers good service. At first， all trains were marked with “CRH”， and that， it was changed to the Chinese characters “和谐号” on the centre of the head vehicles and the side of the walls of other vehicles.
Do you still have any idea about what the train be like? Before， the trains ran at the speed of 50km/h. It is quite slow. Besides， it was dirty because of the use of coal. However， the high-speed train was China in 2004. China Railway High-speed (CRH) can run up to 380km/h. Now， people can travel from one place to another easily and quickly.
