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.
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Question: The pine trees were still green in December, but the oak trees were not, because the _ keep their leaves in fall.

Answer: pine trees


Question: The women used a ball instead of going to a class for her workout. The _ was very bouncy.

Answer: ball


Question: The old cards could not squeeze into the boxes because the _ were too thick.

Answer:
cards