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


question:
Math was the simple paper in the exam and Chemistry the difficult because the _ had a strict teacher.
answer:
Math


question:
James finished the cup of juice but could not take the cup of cocoa because the _ is sweet.
answer:

juice