allow sb / sth to do sth:People aren’t allowed to eat food on the underground in Nanjing.在南京，地铁上禁止人们吃东西。
eg.Being a celebrity—such as a famous film star or sports personality—brings problems as well asbenifit.
While running regularly can’t make you live forever， the review says it __ more effective at lengthening life than walking， cycling or swimming.
