[Före] to his marriage, he was often seen at the fashionable clubs in Soho.

Hint: Find a synonym for ”before”!

Prior

Info: Note that the phrase is “prior to”.

Although [komplicerat] , the problem did admit of at least one finite solution.

Hint: Find a synonym for “complicated”!

complex complicated

By now, the mixture had been heated [tillräckligt] to kill any residual bacterial.

Hint: Find a synonym for “enough”!

sufficiently enough