Problem: How does the sentence end?

The practice was a lot less fun than the game, because the 
Answer: practice was very tiring.

Problem: How does the sentence end?

Jim would rehearse his lines in the closet rather than the ballroom because the 
Answer: ballroom was very open.

Problem: How does the sentence end?

My work training started at 9:00 and I needed to catch the bus at 12:30, so time is tight. Luckily, the 
Answer: training was short, so I managed.

Problem: How does the sentence end?

The lifting improved her flexibility, while, strangely, the stretching did not.  The 
Answer:
lifting was just so effective for her goals.