Rewrite the following sentences, using the construc- tions "There's no use in doing': 'It's no use doing':
What's the use of doing...?'

1) "My sister can't read, that's why it's useless
to send an advertisement to a newspaper," said
Mr. Meeks.
2) The detective was so silly that it was useless to
argue with him.
3)
Mary Snyder didn't live in that crowded district
any longer, so it was useless to wait for her at
her old address.
4) This detective demands so much money for solv-
ing mysteries and crimes that it's useless to ad-
dress him if you are poor.
5) Why employ such a detective if he hardly fits
for his job?
6) Why wait till spring if we can solve the problem
in no time?
7) Why spend so much money on this detective if
we can employ a cheaper one?​

Everyone should show consideration when someone asks for the help
Everyone should be quiet and listen when the teacher explains a new subject and not to interrupt educational process 
We have to respect each other and to be friendly 
We have to help each other in a difficult moment
It is forbidden to smoke because it is harmful to your health.
Nobode can't sing, dance, talk at a lesson because it we will distract others
We can't forbid you to speak on the phone at breaks because parents can call you
It is forbidden to solve a problem with violence as it is necessary to be able to solve it structurally

It is important to appreciate those people who try to help us
Everyone should show consideration when someone asks for help
Everyone should be quiet and listen when when the teacher explains a new topic not to interrupt educational process 

We should respect each other and  be friendly 
We should help each other in a difficult situation
It is prohibited to smoke because it is harmful to your health.
It is not allowed to sing, dance, talk at the lesson because it  will distract others` attention
We can't forbid you to speak by phone during breaks because parents may call you
It is prohibited to solve a problem by violence because it needs solving