If people ... too much fast food, they are fit and healthy.

Ice ... if the temperature rises above 0C. It’s a simple scientific fact.

Mark is allergic to chocolate. If he eats any, he ... red spots all over his body

If you ... a button on the remote control, it sends a signal to the TV.

I will help you with your homework later if it ... too difficult, but try to do it on your own.

If she doesn't feel better by tomorrow, she ... on the trip with us.

We don’t need to worry about getting to the mountains. If my dad ... busy next weekend, my mum will drive us there.

If Tom ... the test tomorrow, he will be in real trouble with the teacher.

We won't finish he project tonight if this computer ... crashing!

I know I ... to study hard next year if I want to go to university.