If you're meaning just a sentence with these two words, then:
She approached the significant hole in the wall, peering through it, a soft sigh of defeat passing her lips when she saw that the impenetrable vault she was meant to go wasn't there.
That help any?
Sentence b does not use an adverb clause
Service is being an active helper in the community and taking action that can be of benefit.
I would say that we know that Telemachus is nervous about talking to Nestor because he tells Athena, he follows Athena at a distance, and he repeats Athena's prayer - word for word.
