Produce a sentence which has a cefr level of "b1" that contains the following words: time, hoppy, background.
As, over time, Hoppy's background unfolded, I discovered that, after reading physics and maths at Cambridge, he had worked as a reactor physicist for the Atomic Energy Commission at Harwell, mainly to avoid national service, but had then fallen into CND, the beat generation, playing in a jazz band, dope and dealing, and had become a professional photographer.