3) Fill in the Blank
爸爸___妈妈
Review b/m with different tones.
他 ___ 它
These three all sound identical (tā, Tone 1) — only the characters differ (he/she/it).
你___
Review two Tone 3 syllables in a row.
不___大
Review b/d with the falling tone.
买 ___ 埋
Three near-identical syllables, only the tone differs — buy/sell/bury.