A
If it had not been for you, I would be in dire straits now.
FOR
____________, I would be in dire straits now.
HAD IT NOT BEEN FOR YOU
Shortly after Sue and Brian met, he announced they were getting married.
HAD
Scarcely__________ he announced they were getting married.
HAD SUE AND BRIAN MET BEFORE/WHEN
You shouldn’t stay out late tonight!
NO
Under ________ stay out late tonight!
NO CIRCUMSTANCES SHOULD YOU
Scientists did not recognize the significance of Rosalind Franklin's contributions until later.
THEN
Only ___________________ the significance of Rosalind Franklin's contributions.
THEN DID SCIENTISTS RECOGNIZE
It is only on this island that tourist can enjoy the benefits of ecotourism.
ON
Only __________ the benefits of ecotourism.
ON THIS ISLAND CAN TOURISTS ENJOY
The media picked up the story as soon as the scientists published their findings.
SOONER
No _________________________ their findings than the media picked up the story.
SOONER HAD THE SCIENTISTS PUBLISHED
The traffic ground to a halt just after they joined the highway.
HAD
Scarcely __________ when the traffic ground to a halt.
HAD THEY JOINED THE HIGHWAY
The council only started showing interest in the redevelopment scheme last month.
UNTIL
Not _________ showing interest in the redevelopment scheme.
UNTIL LAST MONTH DID THE COUNCIL START
We have rarely encountered a thinker as innovative as Ada Lovelace.
SELDOM
____________ a thinker as innovative as Ada Lovelace.
They are only now beginning to make a profit from the company.
NOW
Only ___________ to make a profit from the company.
NOW ARE THEY BEGINNING
It was after years of research that Marie Curie discovered radium and polonium.
UNTIL
Not __________________________________ discover radium and polonium.
Humanity had never before seen such a curious mind as that of Isaac Newton.
BEFORENever _________________ such a curious mind as that of Isaac Newton."
BEFORE HAD HUMANITY SEEN
They knew very little that their ideas would change the world.
THAT
Little ________________________ would change the world.
DID THEY KNOW THAT THEIR IDEAS
Thomas Edison began planning his next experiment right after he finished his prior experiment.
HAD
Hardly _________________________ Thomas Edison began planning the next.
HAD HE FINISHED HIS EXPERIMENT WHEN
They left their car and almost immediately heard a deafening crash.
SOONER
No _________ they heard a deafening crash.
SOONER HAD THEY LEFT THE CAR THAN