Inversion, cleft sentences

Jake was the person who started my interest in collecting pottery.

GOT

It __________ in collecting pottery.

It doesn't matter how badly he behaved, you shouldn't have been so rude to him.

HOWEVER

You shouldn't have been so rude to him, _____________ was.

You must never let anyone else use your Identity Card

SHOULD

Under _____________ let anyone else use your Identity Card.

To help us run the exhibition next month, we need at least six people.

REQUIRED

No _____________ to help us run the exhibition next month.

It is essential that this door is kept unlocked.

SHOULD

On no _____________ locked.

If your order is delayed, we will contact you.

DELAY

Should __________ to your order, we will contact you.

Only when Sarah left did it become clear how much she had contributed to the company's success.

EXTENT

It was not __________ of her contribution to the company's success became clear.

It was the most dangerous situation I had ever been in.
A
Never before __________ dangerous situation.

Lucy was very pleased to be given an award.

DELIGHT

Much to _____________ given the award.

'Marilyn didn't crash the car, John did ,' Keith said.

IT

According to __________ who crashed the car, not Marilyn.