If you have a rhotic accent, you pronounce the /r/ sound whenever the letter 'r' appears in a word, like in 'learn', 'better' and 'perfect'. North American accents are usually rhotic, and other ...

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David Attenborough tells the story of the animal that once bewildered scientists: the chameleon. Watch the full documentary David Attenborough's Natural Curiosities on BBC Select. Train ...