Problem: Continue the following story.

My sister's relationship lasted longer than my marriage because the 
OPTIONS:
- relationship of mine was weak.
- marriage of mine was weak.
Here's how I want to continue it: marriage of mine was weak.

Problem: Continue the following story.

The boots weren't doing their job, so I swapped them out for knickers as the 
OPTIONS:
- boots were fine.
- knickers were fine.
Here's how I want to continue it: knickers were fine.

Problem: Continue the following story.

James cannot carry any more of the books, so he decided to carry some diskettes because the 
OPTIONS:
- diskettes are lighter.
- books are lighter.
Here's how I want to continue it:
diskettes are lighter.