Pinyin β€” Quiz β€” Day 5: The Hard Checkpoint: z c s vs. zh ch sh r

1 How do "zh ch sh" differ from "z c s"?
2 How is the "i" after zhi/chi/shi/zi/ci/si actually pronounced?
3 Listen and choose the correct meaning 吃
4 How is Mandarin "r" pronounced?
5 'δΈ­ε›½' means?