Problem: How does the sentence end?

Donald ate so much food at dinner but Randy didn't touched his food. At the end 
Answer: Randy stomach was empty.

Problem: How does the sentence end?

The house needed redecorating, which Tanya was much better at than Angela, since 
Answer: Angela was much messier with paint.

Problem: How does the sentence end?

Since 
Answer: Benjamin could see, Benjamin described how the beautiful landscape looked to the bemused Neil.

Problem: How does the sentence end?

Monica hated giving speeches in school unlike Betty because 
Answer:
Betty was a lot more confident.