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 essay on microbiology was more interesting than the one written on statistics. _ must be an interesting subject.

Answer: microbiology


Question: Scott saw his company's profit sheet and asked for a raise. It was denied because the _ was too small.

Answer: profit


Question: A spoon of food was served into the baby's mouth but he could not eat it all because the _ is small.

Answer:
mouth