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:
I bought a new pipe, but it didn't fit into the socket, because the _ was too thick.
answer:
pipe


question:
I always did well in that topic, but I alway struggled in the other subject, because the _ was a lot easier.
answer:
topic


question:
Kai applied a hot pack to his groin injury but later changed to a cold pack because the _ was not effective.
answer:

hot pack