20. What is the main risk
factor for skin cancer?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
The main risk factor skin cancer is
solar of the skin without
against ultraviolet radiation
(a carcinogen).

The most lethal cancer is
melanoma.