E-mail, as well as telephones, ____  an important part in daily communication.
A．is playingB．have played C．a(chǎn)re playingD．play
A

試題分析：考察主謂一致。本題的主語是E-mail, as well as telephones；謂語動詞要和前面的E-mail保持一致，故使用單數(shù)形式。句意：電子郵件和電話在日常交流中正在起著一個很重要的作用。選項中只有A項是單數(shù)形式。故A正確。
點評：在英語中，句子的主語和謂語動詞要保持?jǐn)?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(dá)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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