Question

【题目】— That's amazing! AlphaGo won the game. It's much (smart) than humans.
— It's hard to say. After all, AlphaGo was invented by humans.

Answer 1

【答案】smarter
【解析】句意：---太惊讶了！AlphaGo赢得了这场比赛。比人类更聪明。--很难说，毕竟，AlphaGo是被人类发明的。根据句意，故smarter。