Объясните как будет на после 30 час и и до 30 ​

если 30 минут то half past сколько там например 10:30 half past ten

до 30-ти till или until разницы нет,это синонимы

Ned: Hello,Jenny.Welcome to our programme.
Jenny: Thank you.I'm happy to be here.
Ned: What about your school Canada?
Jenny: oh it's really nice. There are paints and paper on all desks there.
Ned: Aren't there any exercise books or calculators? 
Jenny: no there aren't really. we've got pencils, of course, but we haven't got any computers or calculators. we like to paint and draw.
Ned: Are there many boys in your class?
Jenny: Yes there are 10 doys and 8 girls. we are very happy in our school
Ned: Jenny, thank you bery much. 

1. For the purpose of stealing money the accused broke into the bank and threatened the clerk with a gun.

2. Amendments to the Charter come into force after having been adopted by a vote of two-thrids of the members of General Assembly and having been ratified by two-thirds of the members of the UN.

3. All those present in the court-room were interested in hearing something sensational.

4. The wrongdoer is suspected of causing death by dangerous driving.

5. The defendant having been accused of commiting a minor offence, the court passed the decision to fine him.