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 weightlifter felt a lot more tough when working with barbells than with kettlebells, because the _ worked more complex muscle groups.
[A]: barbells


[Q]: I used a battery to take pictures with the camera and put them in an album until the _ needed charging.
[A]: battery


[Q]: John bought a new suitcase for his job, because the _ was a new one.
[A]:
job