1．It\'s not special(特别的)for the young men to finish the hard work in such a short time.
2．Can you tell me where the public toilets(厕所) are?
3．Mr.Wu talked about some social(社会的) problems.
4．For certain(某种)reasons，Mr.Li left there without saying anything.
5．Jack is an honest(诚实的) boy，so we all like him very much.