问题标题:
SAT语法真题求解!会的进!Mostofthebooksaroundthisoldhousesmellofmildew,andifyoupickoneupyouwillfindthatthespinehasdeterioratedandtheircovershaverotted.hasdeteriorated改成什么?
问题描述:

SAT语法真题求解!会的进!

Mostofthebooksaroundthisoldhousesmellofmildew,andifyoupickoneupyouwillfindthatthespinehasdeterioratedandtheircovershaverotted.hasdeteriorated改成什么?

李成立回答:
  我认为你的答案错了hasdeteriorated并不错.   正确答案应该是theircovershave错了.   应该是itscoverhas   因为前面说的是pickoneup   是单数.
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