2.Not all ads play tricks on us though.

但并非所有的广告都跟我们玩花招。 not all表示部分否定。 Not_all people are friendly.

并非所有的人都很友好。 3.When it comes to advertisements, we must all use our intelligence and not be a slave to them！

谈及广告，我们都必须运用自己的智慧，不要做广告的奴隶！ when it comes to ... "提到/谈及......"， to为介词。 There is no doubt that there are kinds of choices on the market when_it_comes_to diet pills.

毫无疑问，一提到减肥药，市面上就有各种各样的选择足以让你眼花缭乱。 　　

　　1．(教材P2)An advertisement uses words and pictures to persuade people to buy a product or service, or to believe in an idea.

　　广告使用文字和图片来说服人们购买某种产品或服务，或者是相信某种理念。

　　persuade vt.说服，劝说；使相信，使信服

　　persuade sb.to do/into doing sth. 说服某人做某事

　　persuade sb.not to do/out of (doing) sth.

　　 说服某人不要做某事

　　persuade sb.of sth. 使某人相信某事

　　①I persuaded him of her honesty.

　　我说服他，让他相信她的诚实。

　　②The advertisement persuaded_her_into_believing that this kind of shampoo could make her hair recover its shine.

　　那则广告使她相信这款洗发香波能使她的头发恢复光泽。

　　③I persuaded him out_of taking over the factory that would close down.

　　我说服他不要接管那家面临倒闭的工厂。

　　④I want to persuade him to_help me with the great work I am doing.

　　我想说服他帮助我做我正在做的这项艰巨的工作。

　　[名师点津]　persuade强调说服，advise表示劝说的动作，不表示结果。如果表示"说而不服"或"劝而不服"，则不能直接用persuade，因为persuade表明已经说服，这时可用try to persuade sb. to do sth. 或advise sb. to do sth.

2．(教材P2)A commercial advertisement is one which someone has paid for to advertise a product or service.