VOA慢速英语:英国新首相约翰逊承诺完成脱欧

exit – v. to go out of a place or situation

replace – v. : to put someone or something new in the place or position o

controversial – adj. relating to or causing much discussion, disagreement, or argument

mayor – n. an official who is elected to be the head of the government of a city or town

benefit – n. the good of something

referendum – n. a public vote on a particular issue