Compléter Round 1 Gap FillVersion en ligne This is a elementary level gap fill focussing on C-V blending par John E 1 over a pass a years An move made ago all expert on This in wrote our is Researchers may have found when humans first spoke ? 1 . 6 million . eight times earlier than we thought . Studies show that the first human language came from Africa . said speech was the key which lot of human physical and cultural changes possible . The expert book about language . He says our brain got bigger 1 . 5 million years ago . An area for language developed brain . Also , tissue in our neck made sounds and speech possible . Speech allowed humans to the world . Humans could think of and plan things , and knowledge .