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

A: microbiology
****
Q: The man could not jump over the wall, but easily hopped over the fence, because the _ was shorter.

A: fence
****
Q: I had a bad nightmare last night about the house and ghosts. The _ was haunted.

A:
house
****