Problem: How does the sentence end?

They took the rowboat down the river because the canoe had a hole in it. The 
Answer: rowboat was watertight.

Problem: How does the sentence end?

Derrick kept a journal but Jason didn't because 
Answer: Derrick wanted to be in touch with their feelings.

Problem: How does the sentence end?

Benjamin did not have a phobia of spiders unlike Justin so 
Answer: Benjamin killed them when they saw them.

Problem: How does the sentence end?

At softball practice, Clare ruined the bat, but her other equipment was fine. The 
Answer:
other equipment must be sturdily made.