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

SOLUTION: microbiology

PROBLEM: It was easier to pedal the bike than the tricycle because the _ was better oiled.

SOLUTION: bike

PROBLEM: I tried to kick the bags with my legs, but I couldn't because the _ were too short.

SOLUTION:
legs