instruction:
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.
question:
the box became weaker after it was soaked in water but the bowl is still strong because the _ is waterproof.
answer:
bowl


question:
I can't remember if I packed my bag with the bowling ball or the soccer ball. The bag was light so it must have the _ in it.
answer:
soccer ball


question:
Although his nose was sensitive, he could not detect the gas, but noticed the flowers.  The _ 's odor was too diffused.
answer:

gas