Identify the sentence that uses passive voice. A. An anti-smoking law was enacted by the city council several years ago. B. A n
umber of customers were angry about the new law. C. Many customers said that they welcome the chance to eat and drink in cleaner surroundings. D. Most of the serving staff have stated that they prefer working in a smoke-free environment.
Since the only preposition in this sentence is <em>through, </em>the correct answer has to be B) preposition: through; object of the preposition: window.