题目选项分析

The first shinkansen, or bullet train, which was built in time for the first Tokyo Olympics, reduced

from 6 hours and 40 minutes to just 4 hours, the time required to travel from Tokyo to Osaka

The first shinkansen, or bullet train, which was built in time for the first Tokyo Olympics, reduced

the travel time between Tokyo and Osaka from 6 hours and 40 minutes to just 4 hours