Answer:
because it looked very beautiful and expensive maybe
We can't see underlining here, but here, I think this will be helpful:
"I read a novel" would be the intependent clause: it does not need the other one to be complete.
"until the guests arrived" is the subordinate clause: it needs the independent, main clause to be complete.
Can you post a picture of the question?
So then you could be able to predict what would or could happen in the future.
