I used several sprays to get rid of the bedbugs but they didn't work, because the 
OPTIONS:
- sprays were powerful.
- bedbugs were powerful.
bedbugs were powerful.

John preferred to enter a chess competition to a baseball game because the 
OPTIONS:
- chess competition was more cerebral.
- baseball game was more cerebral.
chess competition was more cerebral.

The party was thrown by Felicia but Victoria got all the credit, as 
OPTIONS:
- Felicia was ignored by her guests.
- Victoria was ignored by her guests.
Felicia was ignored by her guests.