Reliez les deux éléments de chaque phrase en utilisant if pour exprimer une condition.

Par exemple :
Beer is cheap, so people drink a lot of it.
If beer wasn't so cheap, people wouldn't drink so much of it.

‘Biosphere 2' was privately financed, that's why the experiment took place.

If ‘Biosphere 2' privately financed, the experiment place.
The royal family have behaved unconventionally, so the popular papers have had high sales.

If the royal family unconventionally, the popular papers high sales.
They lost weight because their diet didn't include any sugar.

If their diet sugar, they weight.
Unemployment is high because a lot of factories have closed down.

Unemployment high if a lot of factories down.
The first phase of the project has not been a complete success, so now we need to revise our targets.

If the first phase of the project a complete success, we to revise our targets now.
The weather hasn't held, so I won't do the garden today.

If the weather , I the garden today.