[Q]: How does the sentence end?

Rachel was forced to take baby steps when getting to know Elena, because

[A]: Elena had a fear of intimacy.

[Q]: How does the sentence end?

Rebecca mixed the drywall while Katrina applied it;

[A]: Katrina wanted to be responsible for the final product.

[Q]: How does the sentence end?

The musician played the cello better than the guitar because he had been playing the

[A]:
cello for a longer time.