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A．When a visitor asked her to show him something scary, she held up a mirror to his face! B．However, Michael died suddenly two years ago of a heart attack.
C．According to some scientists, genetically there is only a 2% difference between gorillas and humans: we share the same blood type, have the same number of hairs per square inch and also the same temperament.
D．She has her own home, with curtains, and a nest of blankets, which is her bed, in one comer.
E．What we have learnt is that gorillas are more complex than we ever imagined.
F．Now Koko is so proficient in sign language that if she doesn't know a word she invents one,
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