[Q]: How does the sentence end?

Felicia helped Lindsey memorize their lines, since 

[A]: Lindsey was not familiar with the part .


[Q]: How does the sentence end?

Matthew put copper insulation in their pipes while Robert didn't, so 

[A]: Robert 's pipe were dirty.


[Q]: How does the sentence end?

Mary preferred to use the toaster to warm her bread and not the microwave because the 

[A]:
microwave was broken.