[Q]: How does the sentence end?

In an effort to be spontaneous, Randy surprised Christopher with a trip to the Bahamas.

[A]: Christopher was very nervous about responding.

[Q]: How does the sentence end?

James got tired faster when running on the street than when running in the walkway because the

[A]: street is longer.

[Q]: How does the sentence end?

Jason couldn't get their newborn on a schedule while Adam could because

[A]:
Adam had had one child before.