Problem: How does the sentence end?

Jennifer was excited to play with Kayla but they had already left.
Answer: Jennifer was regretful.

Problem: How does the sentence end?

It is a lot harder to create a website than to create a logo, because the
Answer: website has a longer process.

Problem: How does the sentence end?

At the cosplay convention, Jason showed Brian his new costume because
Answer: Brian was interested in it.

Problem: How does the sentence end?

She was in a hurry and wanted to travel with a plane instead of train, because the
Answer:
train is slower.