[誤] Advertisement exerts a subtle influence on us.
[正] Advertising exerts a subtle influence on us.
注:advertising 為廣告的總稱,是不可數(shù)名詞,作主語時,謂語動詞用單數(shù)。advertisement 是可數(shù)名詞,這類名詞還有machinery--machine, baggage --bag, jewelry--jewel, poetry--poem 等。