type zero and one contitional

İf it........... cold , I wear a coat.

If it rains, the plants and trees..........

When you .........red and blue , you get purple.

If he puts ice in the sun , it..........

If they ..........fast , they get very tired.

If you .......water at 100 °C , it boils.

If he mixes blue and yellow , he .........green.

If the students .............attention in class, they understand the new topic.

If you ..........your homework , your teacher gets very angry.

If he ........... early, he arrives late to school.