They always feel good when they ....
When there are good programs on TV, I ....
Green plants can't survive if ...
If you turn the key, the door ...
If you cool water to zero degrees, .....
If someone enters the building, the alarm ...
She gets nervous when .....
When Mary has time, ....
When John feels tired, he ....
When a bycicle speeds up, it ...
If we take short showers, the electricity bill...
We always feel good when ....
If you touch the fire, ...
If you put food in a fridge, it ...
When it rains a lot, the city ...
If you insert the card, ....
His parents get worried if Peter .....
When I get home late, ....