Why Do Escalator Steps Have Teeth?
Level C1 · 250 sentences · 22:17 · Veritasium
Listen to Why Do Escalator Steps Have Teeth? one sentence at a time, type what you hear and get every word checked.
Level C1 · 250 sentences · 22:17 · Veritasium
Listen to Why Do Escalator Steps Have Teeth? one sentence at a time, type what you hear and get every word checked.