完成句子
①The south of the country was worst __________ by the drought.
该国南方旱情最严重。
②We _____________________the news of Nelson Mandela’s death.
纳尔逊·曼德拉去世的消息使我们深感悲痛。
③Both of us had the qualities and virtues that are typical of American actors: humorous, aggressive, and making fun of each other — but always with an underlying _____________ (affect).
④ Some researchers argue that we can seal the machines inside a kind of firewall, using them to answer difficult questions but never allowing them ___________(affect) the real world.