[lesson: 021 - 0/2/100]
Have you ever seen a mammoth? No. Mammoths are now extinct
Voi ma mút hiện đã tuyệt chủng/ hæv juː ˈe-və siːn ə ˈmæ-məθ? - nəʊ ˈmæməθs ə naʊ ɪkˈstɪŋkt /