Choose the past perfect or the past simple. 3. When I discovered I had forgotten my passport, (get) to the airport, I...

{ "answer": "3. When I discovered I had forgotten my passport, I **got** to the airport.

**Explanation:**
* The sentence describes a sequence of events in the past. 'Discovered' is in the past simple. The action of getting to the airport is also in the past and happens after the discovery, so it should also be in the past simple." }