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.

[EX Q]: We were making icing for the cake, vanilla and lemon, but the _ was too sour.
[EX A]: lemon

[EX Q]: The pastry chef took biscuits out of the oven and put them into a basket until the _ was empty.
[EX A]: oven

[EX Q]: The dentist says I need to brush and floss my teeth better. I try to use the _ but I need a replacement.
[EX A]:
brush