1)Because the water is polluted, people in the village get a strange disease. -> Because of
2)He is very nice, but I don't really trust him.
-> Even though
3)In spire of the heavy rain, my father went to work.
-> Although
4)We arrived at the school safety although it was raining heavily.
-> In spite of
5)We were late for school because of the heavy rain.
-> Because it