Grammar : Zero Conditional

If it doesn't (a)   (rain), plants cannot grow.

If I (a)   (try) to cook, I ruin the food.

If you smoke, your skin (a)   (age) more quickly.

If you heat ice, it (a)   (melt).

I feel good if you (a)   (visit) me regularly.

Water evaporates if you (a)   (boil) it.

Deren (a)   (cycle) to work if the weather is good.

I feel sick if I (a)   (eat) too much chocolate.

You need to take my sister to the hospital if she (a)   (drink) milk as she is allergic to it.

If Andy (a)   (go) to bed late, he cannot wake up early.