Problem: Continue the following story.

It took longer to read the book than the letter because the 
Here's how I want to continue it: book was longer.

Problem: Continue the following story.

The class took an exam in the classroom  instead of a quiz since the 
Here's how I want to continue it: exam was sooner.

Problem: Continue the following story.

I wanted to update the basics of my wardrobe for work so I bought a black dress but not a short skirt because the 
Here's how I want to continue it:
skirt is inappropriate.