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: Jenna added chlorine gradually to her pool, because she wanted to make sure that the _ was making it cleaner.

A: chlorine
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Q: Jane was starring at the sea until the sun set behind it and now just the _ is invisible.

A: sun
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Q: The bold actor could memorize any lines, but had a hard time following instructions, as the _ were just a breeze for him.

A:
lines
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