她说最迟8点要到那里。

She said to be there by 8 o'clock ___at ___the ___latest.

请最迟周五提交报告。

Please submit your report by Friday ___at ___the ___latest.

我们最迟月底需要完成这个项目。

We need to finish the project by the end of the month ___at ___the ___latest.