根据所给的首字母和汉语注解，写出该词的正确形式
【小题1】Many people have b____(受益) from the treatment.
【小题2】Everybody knows the h____(有害的) effects of smoking.
【小题3】Mary was sitting in the living room, c____(闲聊) with her mother about housework.
【小题4】A shark(鲨鱼) can smell blood at a d____(距离) of half a kilometer.
【小题5】She works n____(附近), so she will soon arrive home.