Problem: How does the sentence end?

Jake replaced his metal bike for a carbon one because the 
Answer: metal was too heavy.

Problem: How does the sentence end?

Matthew started the fundraisers and Eric donated to it, so 
Answer: Eric was successful in giving some money.

Problem: How does the sentence end?

His reasons helped me understand the tasks a lot better than before, because the 
Answer: tasks were confusing.

Problem: How does the sentence end?

People at the meeting felt more intimidated by Mary than by Betty because 
Answer:
Betty was more meek.