Question

Вставьте артикли 1 they make bread here 2 he missed train. that was reason he arrived late. 3 if you heat __ water to 100c it boils.

Answer 1

1) They make a bread here.
2) He missed the train. That was the reason he arrived late.
3) If you heat water to 100 C it boils.
вот, предложения написаны так как надо.

Answer 2

They make a bread here.
He missed the train. That was the reason he arrived late.
If you heat water to 100C it boils.