Problem: Continue the following story.

Betty's dog is dangerous and she asked Laura to train her dog, because 
Here's how I want to continue it: Laura is a dog trainer.

Problem: Continue the following story.

The vinegar was used to wash the floor and make the salad with other spoiled ingredients added. The 
Here's how I want to continue it: salad was contaminated.

Problem: Continue the following story.

Ben wanted a faster ride to India. His mom booked both a train and plane ride. However, he returned the 
Here's how I want to continue it:
train because it was inefficient.