27.
Your Answer is
Correct Answer is B
Explanation
Here means "except for working as an elevator operator...", before and after are complete sentences, led by conjunctions, item B except that "except" can connect two sentences together, correct.
Item A: accept "accept" is a verb, it is the two verbs in the previous sentence, wrong.
Item D: Semantic barrier.
Item C: except for is a prepositional phrase, and it cannot be followed by a sentence.