Select the correct passive form of the given sentence.
Before I could ride my bike, I had to repair the puncture.
1
Before I could ride my bike, the puncture had to be repaired.
2
Before I could ride my bike, the puncture had been repaired.
3
Before I could ride my bike, the puncture was being repaired.
4
Before I could ride my bike, the puncture was to be repaired.
5
None of these