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: Ty had more pimples on his back than on his face because the pores on the _ were clogged.

A: back
****
Q: As the gas filled the room, most people opted for the mask instead of the bag since the _ was efficient.

A: mask
****
Q: Teaching was a chore as the chalk wouldn't write on the chalkboard. The _ was rigid.

A:
chalkboard
****