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: Bob held his gerbil in the box instead of putting it on the floor because it was more loose on the _ .

A: floor
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Q: The cage held the lion from entering the field, as in the _ he could cause substantial harm to other animals.

A: field
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Q: In the dojo, the ninja doesn't enjoy sparring on the mat. He loves sparring on concrete instead. That's because the _ feels realer to him.

A:
concrete
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