If law and order as well as rules and regulations ______, neither the citizen nor his property is safe.
A．are not observedB．is not observed
C．were not observed D．was not observed
B

試題分析：考察主謂一致和語態(tài)。本句的主語是law and order as well as rules and regulations,謂語動詞應該與前面的law and order保持一致，這里表示的是兩個不同的概念，故使用復數(shù)形式。句意：如果法律命令和規(guī)則沒有被遵守，那么人們和財產也就都不安全了。根據(jù)句意說明使用被動語態(tài)的形式。故B正確。
點評：在英語中，句子的主語和謂語動詞要保持數(shù)上的一致關系，叫主謂一致。這種關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；主語是復數(shù)形式，謂語動詞用復數(shù)形式2．意義一致原則即謂語動詞該用單數(shù)還是復數(shù)取決于主語所表達的內容在含義是單數(shù)意義還是復數(shù)意義。3．鄰近原則謂語動詞該用單數(shù)還是復數(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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