As we all know, smoking ___________ people’s health.
A．is harmful toB．do harm foC．does harmful toD．harm
A

試題分析：考查詞組和主謂一致：對(duì)…有害：be harmful to或do harm to或用harm sth，所以先排除C項(xiàng)，當(dāng)主語(yǔ)是動(dòng)名詞的時(shí)候，謂語(yǔ)是單數(shù)，選A。
點(diǎn)評(píng)：詞組的考查主要是看意思相同的短語(yǔ)，主謂一致的考點(diǎn)較多，要在理解的基礎(chǔ)上加以記憶，多練習(xí)加以鞏固。這里的考查動(dòng)名詞做主語(yǔ)，還有不定式做主語(yǔ)，謂語(yǔ)都是單數(shù)，關(guān)鍵是記憶。
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