Answer to Out-of-Date and Obsolete? That Trend May be “老掉牙 (Lǎodiàoyá)”!
Answer: C
In 2011, the Beijing-Shanghai High-Speed Rail opened, cutting the trip down to 4.5 hours. The slower train built in the 1950s, used to take 12 to 15 hours. Today, you can still ride the “old” train line. However, it is “老掉牙 …