Learn some interesting and unusual facts whilst doing a reading and listening comprehension. The resource is from the British Council Learn English website and has a gapfill activity to assess your understanding of the material you have studied.
British Council reading text on animal conservation with a gapfill exercise (insert the word that best makes sense) to assess your understanding of what you have read. There is also an exercise on finding opposites.
An excellent exercise to follow directly on from the podcast. Simply insert the preposition that makes the sentence make sense in this gapfill activity.