Choose the correct sentence which is built from the words and phrases given:
I / at university / an embarrassing experience / never forget.
When I was at university, I had got an embarrassing experience that I will never forget.
No sooner when I was at university, than I had got an embarrassing experience that I will never forget.
When I was at university, and I had got an embarrassing experience that I will never forget.
I was at university as soon as I had got an embarrassing experience that I will never forget.
When I was at university, I had got an embarrassing experience that I will never forget.