Problem: How does the sentence end?

She wanted a fountain pen but bought a rollerball pen instead, because the 
Answer: fountain pen is more expensive.

Problem: How does the sentence end?

John had to return the chair he bought for his new office as it could not get into it because the 
Answer: office is small.

Problem: How does the sentence end?

the river drained the water to the ocean until its source was no longer with water, the 
Answer: ocean was plentiful.

Problem: How does the sentence end?

His car collections would not fit into the garages because the 
Answer:
garages were too few.