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

A．opened           B．open             C．to open           D．to be open

 

【答案】

B

【解析】

試題分析：當(dāng)購物時(shí)，睜大你的眼睛看看這些節(jié)能機(jī)器。Open是瞬間動詞，不能表示持續(xù)性動作，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：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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