Problem: Continue the following story.

Joseph wanted to finalize the separation from Christopher, because 
OPTIONS:
- Joseph was constantly dragging it out.
- Christopher was constantly dragging it out.
Here's how I want to continue it: Christopher was constantly dragging it out.

Problem: Continue the following story.

The documents I wrote that day could not fit the envelop because the 
OPTIONS:
- document  was too small.
- envelop  was too small.
Here's how I want to continue it: envelop  was too small.

Problem: Continue the following story.

The nails that I bought to construct the desks did not work, because the 
OPTIONS:
- nails were too strong.
- desks were too strong.
Here's how I want to continue it:
desks were too strong.