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]: The woman enrolled her puppy in training classes to get him to walk on a leash, because the _ scared the puppy.
[A]: leash


[Q]: John dusted the furniture in his room with a towel and it got the _ dirty.
[A]: towel


[Q]: The sick man took tissues from the box to blow his nose and put them in the waste basket until the  _ was empty.
[A]:
box