When shopping, keep your eyes ______for those energy-saving machines.


  1. A.
    opened
  2. B.
    open
  3. C.
    to open
  4. D.
    to be open
B
試題分析：當(dāng)購(gòu)物時(shí)，睜大你的眼睛看看這些節(jié)能機(jī)器。Open是瞬間動(dòng)詞，不能表示持續(xù)性動(dòng)作，故本句中open用作形容詞開著的，做賓語補(bǔ)足語，選B。
考點(diǎn)：詞性辨析
點(diǎn)評(píng)：英語單詞的一個(gè)特點(diǎn)就是一詞多義，一詞多性，即一個(gè)單詞可以有多個(gè)不同詞性的用法。因此我們首先要詳細(xì)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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