_______________he arrives, everyone must stand. (UNTIL / WHEN)
WHEN
We won’t stop searching __________ we find a solution. (UNTIL / AS)
UNTIL
The area is going to be checked _______ soon as the President arrives. (BEFORE / AS)
AS
Those flowers will be blooming _______ the time spring comes. (WHENEVER / BY)
BY
________ soon as you hear the alarm, run for the exit. (BEFORE / AS)
AS
Call me ______________ it's convenient. (WHENEVER / AS)
WHENEVER
__________ she arrives, we can start. (ONCE / UNTIL)
ONCE
I had ___________ left the house than it started raining. (AFTER / NO SOONER)
NO SOONER
The concert had _________ begun before the lights went out. (EVER SINCE / HARDLY)
HARDLY
_______________ they got to the station, the bus had already left. (BY THE TIME / WHENEVER)
BY THE TIME
They haven't seen each other ___________ they graduated from high school. (BY / EVER SINCE)
EVER SINCE
