Problem: How does the sentence end?

Megan grew their plants better than Elena grew theirs because 
Answer: Megan watered them more often.

Problem: How does the sentence end?

Kevin got an error on his computer but could not fix it like Kenneth because 
Answer: Kevin had no knowledge of technology.

Problem: How does the sentence end?

Brian liked to ride a bike very often but Robert did not because 
Answer: Robert was very lazy.

Problem: How does the sentence end?

Lawrence asked William for some help with their handwriting, because 
Answer:
Lawrence had forgotten how to write.