Problem: How does the sentence end?

Laura scowled when Christine leaned over to ask their classmate for the answers to the quiz they were taking, as 
Answer: Laura was a good student.

Problem: How does the sentence end?

She used a ruler to draw the straight line instead of the measuring tape, because the 
Answer: measuring tape was less accurate.

Problem: How does the sentence end?

Sarah Jane's watch smashed when the book hit it since the 
Answer: book was too strong.

Problem: How does the sentence end?

The girl was more successful playing the piano than the harp because she practiced the 
Answer:
piano more often.