sentence: We tried to get the bookcase through the door, but the  OPTIONS:
- door was not wide enough.
- bookcase was not wide enough.
complete: door was not wide enough.

sentence: Steven but not Benjamin was a good speaker because  OPTIONS:
- Steven took several linguistic classes in school.
- Benjamin took several linguistic classes in school.
complete: Steven took several linguistic classes in school.

sentence: Nelson told Craig that he volunteers at a nonprofit to stop horse slaughter.   OPTIONS:
- Nelson is generous.
- Craig is generous.
complete:
Nelson is generous.