【題目】If law and order ______, neither the citizen nor his family is safe.

A．are not preserved

B．is not preserved

C．were preserved

D．have not been preserved

【答案】B

【解析】此處主語law and order指的是同一個概念，所以謂語動詞要用第三人稱單數(shù)形式。句意：如果法律與秩序不被保護(hù)，公民和他的家庭都不會安全。故選B項(xiàng)。

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