As a contestant, I think, one should be confident and full of hope.

作为一名选手，我认为，人应该充满信心和希望。

youdao

When working, one should concentrate and not allow oneself to be distracted.

工作时要集中精力， 不要分心。

《新英汉大辞典》

In such circumstances no one should be too hard on people who are suspicious of conflicts of interest.

在这种情况下，任何人都不应该对怀疑利益冲突的人过于严厉。

youdao

"One should work on this and stop sleeping." Russia has also suffered a serious brain drain since 1991, the report says.

VOA: standard.2010.02.03

So let me turn to a different approach to solving the question, answering the question,which one should we believe?

所以让我用另一个方法来解决这个问题，回答该相信哪一个理论的问题？

耶鲁公开课 - 死亡课程节选

because no one really wants to pay more for good than it should be.

因为没人真的愿意花更多的钱去买不值那个价钱的东西。

中国的影响力 - SpeakingMax英语口语达人

It warned no-one should lose their benefits because they are unable to use the internet.

BBC: universal credit claim form

No one should pretend to know where or who will be the next Apple.

FORBES: Paul Graham Is Right. Everyone Should Stop Caring About Apple

And one should never underestimate the tendency of a U.S. CEO to get rid of workers.

FORBES: Connect