Ответ:

1. The train journey from Moscow to St. Petersburg has improved 1) greatly since the line was first opened in 1951.

2. You get to your 2) destination in less than four hours.

3. The airport commute is avoided, and you get on and off the train at a central station, saving 3) valuable time.

4. Sapsan caters to the 4) requirements of the modern business traveler...

5. But even the economy classes are extremely 5) comfortable.

6. Traveling between these two Russian cities has never been more 6) luxury.

Объяснение: