Problem: How does the sentence end?

I wanted a treat either chocolate or watermelon. I chose the 
Answer: chocolate although it was sweet.

Problem: How does the sentence end?

The plants stopped manufacturing robots and switched to cars, as the 
Answer: robots were expensive to produce.

Problem: How does the sentence end?

It hurt when the bar was pressing on his chest, but not the beam, because the 
Answer: beam was light.

Problem: How does the sentence end?

Natalie never checks the air in the tires while Tanya does and you just knew 
Answer:
Tanya would have full tires.