[Q]: How does the sentence end?

Cynthia made a 4 batches of cupcakes and asked Sarah to help with the decorating them because 

[A]: Sarah frequently decorated cupcakes before.


[Q]: How does the sentence end?

Before pouring the cement, Jason wanted to teach William how to pour it so 

[A]: William would do it properly.


[Q]: How does the sentence end?

Though they are twins, Jeffrey is much heavier than Jason, as 

[A]:
Jeffrey hates to exercise.