Problem: How does the sentence end?

The coin collection sold for more than the card collection as auction, because the 
Answer: card collection was common.

Problem: How does the sentence end?

The bone was broken when James tried to use it to break the wall. It turns out the 
Answer: bone is weaker.

Problem: How does the sentence end?

The fish in the lake were healthier than the fish in the pond because the 
Answer: lake was clean.

Problem: How does the sentence end?

The fracture on the leg of Emily was worse than that on Kayla although 
Answer:
Kayla fell from a greater height.