<p>Are you ALL READY for the ENGLISH EXAM?" asks MOM. NO ERROR</p>
<p>What is the error? Mom is the correct answer, but why?</p>
<p>***? Did you just make that up or something? Questions like that have NEVER shown up in any of the SAT tests I’ve taken.</p>
<p>^ the answer’s asks mummy (not mom) *serious face</p>
<p>all ready is wrong because the pronoun all is plural while the pronoun you is singular. Pronouns must maintain consistecy. The sentsnce is an example of faulty idiom.</p>