用英语怎么说1我将尽力准时完成这项工作2尽力别迟到3昨天我收到我父母的来信4你收到谁的来信了?

1.I will try my best to finish the work on time.
2.Don't be late,I will try my best .
3.I heard from my parents yesterday.
4.Who did you hear from?