Problem: How does the sentence end?

James could not comprehend the topics in the book within the time give to him because the 
Answer: topic is difficult.

Problem: How does the sentence end?

The woman donated the book but kept the bible because the 
Answer: book was unimportant to her.

Problem: How does the sentence end?

Lauren was surprised to hear that meat was healthier to eat than yogurt because the 
Answer: yogurt contains a higher percentage of fat.

Problem: How does the sentence end?

Erin sat very straight, so Jessica tried to imitate him, because 
Answer:
Erin had great posture.