Which sentence uses the passive voice?
a. Before I could check out another book, I had to pay the fine for the late one.
b. I paid the fine for the late book, and then I checked out another.
c. I checked out another book after I paid the fine for the one that was late.
d. The fine for the late book was paid before I could check out another.
The sentence that uses a passive voice is a because before you can borrow a book from the library, you need to pay a fine for the book that you already finish reading after the due date.
