Mary is digging in the ground for a photo
进入查看：2022-2023学年英语周报高二第36期答案及试题
Mary is digging in the ground for a photo, when along comes John. Seeing that there is no one in sight, John starts to scream. John’s angry mother rushes over and drives Mary away. Once his mum has gone, John helps himself to Mary’s potato.
We’ve all experienced similar annoying tricks when we were young—the brother who stole your ball and then got you into trouble by telling your parents you had hit him. But Mary and John are not humans. They’re African baboons(狒狒).
John’s scream and his mother’s attack on Mary could have been a matter of chance, but John was later seen playing the same tricks on others.
Studying behavior like this is complicated but scientists discovered apes(猿) clearly showed that they intended to cheat and knew when they themselves had been cheated.An ape was annoying him, so he tricked her into going away by pretending he had seen something interesting. When she found nothing, she “walked back, hit me over the head with her hand and ignored me for the rest of the day.”
