Have you finished you work        ? Yes, I have finished it       . I finished it        1 hour ago.


  1. A.
    already ,yet ,/
  2. B.
    yet , already, /
  3. C.
    yet ,yet, since
  4. D.
    yet ,already, since
B
試題分析:already多用于肯定句,表示一事實 意為 已經(jīng) 早已;yet則多用于否定句、疑問句,意為 還、尚、迄今、到那時。Since表示自從……以來。句意:你已經(jīng)完成你的作業(yè)了嗎?——是的,我已經(jīng)完成了。我是一個小時前完成的。1 hour后已有副詞ago,故不再用介詞since,故選B。
考點:詞性辨析
點評:英語單詞的一個特點就是一詞多義,一詞多性,即一個單詞可以有多個不同詞性的用法。因此我們首先要詳細了解這些單詞作為不同詞性的含義及用法,尤其注意其比較特殊的用法,然后結(jié)合語境選擇正確答案。
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