题目内容
---Have you returned the book to the library ____? ---Yes, I have ____ returned it.
A.yet, yet | B.already, already | C.already, yet | D.yet, already |
D
yet和already都表示 “已经”之意,通常用于完成时态。yet 用于问句或否定句,位于句尾;而 already 用在肯定句里,位于句中,即be动词或助动词之后,行为动词之前。故本题选D。
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