Story needs to be completed:
Joseph cares for Kyle much of the time since

My choice:
Joseph is willing to take responsibility.

Story needs to be completed:
His allergies were worse at home than at the office, because the

My choice:
home was exposed to the outside elements.

Story needs to be completed:
Elena loves to read books but Jessica does not.

My choice:
Elena bought books all the time.

Story needs to be completed:
There were more books at the library than at the bookstore because the

My choice:
bookstore was smaller.