[Q]: How does the sentence end?

After mastering the harp, the musician moved onto the trumpet, because the

[A]: harp bored them now.

[Q]: How does the sentence end?

The semi truck could not navigate into the car wash, because the

[A]: semi truck was too long.

[Q]: How does the sentence end?

In a group Cynthia was usually silent but Rebecca was not because

[A]:
Cynthia was a naturally reserved person.