求大神帮忙翻译一下这些英语句子~~谢谢！

1. It seems useless for Tom to persuade those students to accept the apologies from the school master.
2. It is a general acknowledgement that how to be a tactful employee in the office is the first priority.
3. Your present job is to notify them not to enter the room which has been locked for more than three decades.
4. As a matter of fact,it is not as easy as you thought to seek a suitable person to be in this position.
5. If you had come yesterday, you might have seen the celebrity .But unfortunately you didn`t shou up.
6. I could have graduated from that school this June.But due to something that happened at that time,I had to postpone it.
7. You should not have done it at that time,bacause I heard his aim was to teach us how to escape from prison.
8.As far as I know, it will be useful to learn the skill which Mary told you just now,so that`s why I am behind you.
9. To be honest with you , it is not as easy as you thought to compete with them here. So,you`d better look before you leap.
10. To tell you the truth, it is a terrible mistake for the authorities to carry out the project.But unfortunately, no one listened to me at that time.
11. Only in this way , can we dwell with local residents under a harmonious at mosphere.
12. In fact , the animal species which you saw on TV last night has already become extinct from this planet.
13. Many agree that the experiences which people acquire from daily life have an impact upon the formation of their personalties.
13. Admittedly ,along with the prevalence of the Internet , it does exist some undeniable problems .A considerable proportion of uebsites are saturated with pornographic and violent elements , which would undoubtedly pose a threat to the youngsters` growth.