Giúp mik vs ạ mik cần gấp 
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Practice - Fill in the blanks with the correct form of the verbs
OPERATOR: I'm listening. What is your emergency?
CALLER: Hi I'm Alex Cooper and I need an ambulance for my son.
OPERATOR: What happened to your son?
CALLER: His head is bleeding very badly.
OPERATOR: Stay calm and tell us more about it.
CALLER: I (1)...
While I (3).....
(4).............. (hit) a tree and fell off his bike. His head is bleeding badly.
OPERATOR: Where are you now?
CALLER: We are in the park opposite the city theatre. It's on Parker Street.
OPERATOR: Okay. Don't move him until we come.
(teach) my son to ride a bike when I (2).
(get) a phone call.
(answer) the phone, my son rode his bike by himself. Then suddenly, he