The accused never expressed regret for what he had done / At _____________ regret for what he had done (TIME)

The money is not to be paid under any circumstances / Under _____________ to be paid (CIRCUMSTANCES)

Nobody from this school has ever written a better composition / Never _____________ written a better composition (ANYONE)

Such was the demand for tickets that people queued all day and night / The demand for tickets _____________ that people queued day and night (GREAT)

Little did Brenda know what she was letting herself in for / Brenda _____________ what she was letting herself in for (NO)

Please never ever interrupt me when I'm in a meeting / On no account _____________ when I'm in a meeting (AM)

Exhaustion prevented any of the runners from finishing the race / So _____________ of them finished the race (WERE)

Three days passed before we arrived at the first oasis / Not until _____________ at the first oasis (HAD)

It's not common for there to be so much rain in March / Seldom _____________ so much rain in March (SEE)

It was only when I stopped that I realized something was wrong / Only _____________ that something was wrong (DID)