The city government is planning to build a factory to deal with the industry waste，but when and where to build it________.
A．haven’t been decided　　　B．a(chǎn)ren’t decided
C．hadn’t been decided　　　D．hasn’t been decided
D

試題分析：考察主謂一致和被動語態(tài)。本題句子的主語是when and where to build it這是一個不定式結(jié)構(gòu)在句中作主語，表示的是一件事情，故使用單數(shù)形式。句意：市政府計劃建一個工廠來處理工業(yè)污水，但是何時何地來建設(shè)這個工廠還沒有被確定。根據(jù)句意說明使用被動語態(tài)。故D正確。
點評：在英語中，句子的主語和謂語動詞要保持數(shù)上的一致關(guān)系，叫主謂一致。這種關(guān)系通常要遵循下面三條原則：1．語法一致原則。句子的主語是單數(shù)形式，謂語動詞要用單數(shù)形式；主語是復(fù)數(shù)形式，謂語動詞用復(fù)數(shù)形式2．意義一致原則即謂語動詞該用單數(shù)還是復(fù)數(shù)取決于主語所表達的內(nèi)容在含義是單數(shù)意義還是復(fù)數(shù)意義。3．鄰近原則謂語動詞該用單數(shù)還是復(fù)數(shù)形式，取決于最鄰近它的名詞、代詞或其它詞的數(shù)。
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