Task C, Academic Tone and Style, Nominalisation, Unscramble Exercise Q3

Source: BBC: http://www.bbc.co.uk/news/entertainment-arts-24014186

The sentences below are too simple and repetitive for good university writing.

Combine all of the ideas in the simple SVO sentences below into ONE complex noun phrase. Drag and drop each word onto the top line in correct sequence.

It is an experience.
It happens only once in a lifetime.