英语翻译1.上课时认真听讲是礼貌的(manners).2.真遗憾,首相拒绝对最近发布(issue)的报告发表评论.(pity,comment)3.抽烟和肺癌之间有没有联系?（there,connection)4.众所周知,哥伦布发现了美洲.(It,universally)5.一旦你开始做一件事,坚持下去直到做完.不要翻译器的哦

1.It's a good mannner to listen carefully at class.
2.It's really a pity that the Prime Minister rejected to have comments on the latest issue.
3.Is there any connection between smoking and lung cancer?
4.It is universally known that Columbus discovered America.
5.Once you start to do something,you should stick to it until it is accomplished.