[Q]: How does the sentence end?

Benjamin was optimistic and successful while Robert was pessimistic and had bad luck, so

[A]: Robert experienced happiness seldomly.

[Q]: How does the sentence end?

Sarah showed Kayla how to sit in a saddle for the first time since

[A]: Sarah has ridden a horse a lot.

[Q]: How does the sentence end?

Christopher helped Randy to obtain a federal employer identification number because

[A]:
Christopher has more experience in that area.