The conjunctions?

Looking to make sure I found all the words acting as conjunctions - I was advised that I had two incorrect ones, but I can't seem to find the one I missed (I found the other one). If someone can point out what my other mistake is, I'd greatly appreciate it. I've been driving myself nuts trying to figure out what it is!

1. Terry seemed very cautious when he discussed the budget.

He had only six years of formal schooling; however, he succeeded remarkably well. (originally thought "only" was a conj., but after looking at it, it appears to be an adverb)

Buy the machine but don’t pay an unreasonable price.

Since this bond paper is too light in weight, we cannot use it for this correspondence.

1. We have to raise the money, or we will have to file bankruptcy.

You must give Mr. Krueger the requested information; otherwise, he will be angry.

1. She doesn’t know a comma from a colon; hence, we cannot use her services.

1. Because our lease will expire in three months, we may be forced to move our business.

1. Mr. Coleman shouted and she trembled.

1. The materials were not entirely satisfactory; nevertheless, Frazier decided to use them.

Thanks to those that can help!