Choose the correct options

1. Only [after|at|by|in|on|until]
   this way can you solve this riddle.
2. Only
   [after|at|by|in|on|until]
   practice can you learn to play the piano well.
3. [After|At|By|In|On|Until]
   no time should you tell him the truth.
4. [After|At|By|In|On|Until]
   no account should you do anything without your parents' permission.
5. [After|At|By|In|On|Until]
   no way do I want to watch this boring film.
6. Only
   [after|at|by|in|on|until]
   you finish your homework can you play.
7. Not
   [after|at|by|in|on|until]
   much later did I realise my mistake.
8. [After|At|By|In|On|Until]
   no circumstances should you open the door to strangers.