[Q]: How does the sentence end?

I wasn't able to push the cart through the aisle because the

[A]: cart is too wide.

[Q]: How does the sentence end?

Pippa was feeling shy about showing her poem to her teacher so she hid it inside a book, because the

[A]: book was never used by anyone.

[Q]: How does the sentence end?

Erin was far more likely to enjoy fishing than Sarah because

[A]:
Erin liked the beach and being outdoors.