You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.

[Q]: they had a pet tarantula that liked to climb the walls instead of the floor, because the _ were higher.
[A]: walls


[Q]: The woman drank from the faucet instead of the fountain, because the _ had run dry.
[A]: fountain


[Q]: The teacher was very patient teaching guitar to the student because _ was an expert at the instrument.
[A]:
teacher