False (F). a
Jane Goodall observed gorillas.
b Jane Goodall's study is the longest study of animals in the wild.
C Chimpanzee used twigs
to catch ants.
d Tool use requires fingers.
e Octopuses use coconut shells to hide.
f Only humans use tools symbolically.

i want to tell you about my friend sergei. he was thirteen years old. it is usually awkward teenager, forever sticking with vortices and bruises on her arms. notable in his eyes only: they are big, round, wide-open, gray. when i look at sergei, i think he was surprised by all that he sees, therefore, wants to understand and learn. sergey - athlete swimmer. his second adult category in freestyle, but he had it is not proud. and only occasionally uses: sometimes argue with the guys that first doplyvet to the other side of the pond, or say that will sit the longest underwater. but this is not the main thing in his character.        last year he saved me, especially after that we became friends. i did not swim, but never in this or recognized anyone. sergei proposed to swim to the island in the middle of the river. swam, and for some reason i got scared and began silently to sink. sergei saw and pulled me out. then he worked with me, now i "tolerably swim" as noted by my friend.        but i'm helping sergei tuition when he falls behind or do not understand something. he often goes to the competition, it is a long time in training camp, a lot of misses training. sergei smart, when i told him explain difficult material, it quickly "catches" and all is well absorbed.        in his spare time, we love to play with a friend in football or hockey, read a good book, just an exchange of views about an interesting film.        we value our friendship.