Most experts agree that human activities such as the clearing of large areas of forests, and farming on a large scale _________ the problem of global warming.


  1. A.
    is leading to
  2. B.
    is resulting in
  3. C.
    are contributing to
  4. D.
    are owing to
C
試題分析：考察主謂一致和詞義辨析。Activities 是從句的主語(yǔ)，所以選C和D; 按句子意思應(yīng)選詞義為“導(dǎo)致”的選項(xiàng)contribute to.故C正確。
考點(diǎn)：考察主謂一致和詞義辨析
點(diǎn)評(píng)：在英語(yǔ)中，句子的主語(yǔ)和謂語(yǔ)動(dòng)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(yǔ)法一致原則。句子的主語(yǔ)是單數(shù)形式，謂語(yǔ)動(dòng)詞要用單數(shù)形式；主語(yǔ)是復(fù)數(shù)形式，謂語(yǔ)動(dòng)詞用復(fù)數(shù)形式2．意義一致原則即謂語(yǔ)動(dòng)詞該用單數(shù)還是復(fù)數(shù)取決于主語(yǔ)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(yǔ)動(dòng)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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