___ the sun rose, the birds began to sing outside my window.
As
_____ my little brother was asleep, I walked quietly through the house.
Since (or because)
_____ the teacher explained the project, I took careful notes to remember the steps.
As
______ it started raining, the soccer game was moved indoors.
Since (or because)
I studied every night _____ I wanted to do well on the science test.
because
We left early _____ the traffic report said there would be a big delay.
because