3. I ______ (swam / swim) 5 kilometres and ______ (won / win) the first place and the prize in 2024!

• 3. I swam 5 kilometres and won the first place and the prize in 2024!

Explanation: The past simple tense is used for completed actions in the past. The year 2024 implies a past event from the perspective of the writing context, or it could be a future event for which past tense is used speculatively, but given the other sentences, past is more likely.