[Q]: How does the sentence end?

Elena thought Lindsey was overbearing, because

[A]: Lindsey tried to drag them along to all the exciting rides and convince them to get on.

[Q]: How does the sentence end?

The roof collapsed under the weight of the meteor strike, but the floor stood firm, since the

[A]: roof was so brittle.

[Q]: How does the sentence end?

Unlike the shy Amy, Monica was an extrovert, so

[A]:
Amy dreaded attending the big party.