sentence: The engineer had to take the pressure off of the box from the ball because the OPTIONS:
- box would have exploded.
- ball would have exploded.
complete: box would have exploded.

sentence: The flute sounded dead in the hallway, but wonderful in the parlor, since the OPTIONS:
- hallway had such dismal acoustics.
- parlor had such dismal acoustics.
complete: hallway had such dismal acoustics.

sentence: It took another hour for Rebecca to fill the tank with water as compared with Jennifer because OPTIONS:
- Rebecca worked very quickly.
- Jennifer worked very quickly.
complete:
Jennifer worked very quickly.