ReVIeW

vocabulary recap:

lever

primary instinct: hunger,thirst, fear, anger, sexual desire,...

mating ritual

orangu-tan

beak

faculty

ape

twist and turn

arabic numerals

one-way mirror

crow

unheard

laboratory  /ləˈbɒrətri/ DJ  /'læbrəˈtɔrɪ/ KK US

bodily-kinaesthetic intelligence

athletics

symbiotic relationship

chimpanzees

well-rounded

habitat

raise eyebrows

fetch a ball = go outside and get the ball

reconcile = find the balance ( medical researchers, who use chimpanzees to study diseases, such as Aids and cancer, may find difficult to reconcile with their work.)

dilemma: on the horns of a dilemma