答案：
Commercial Advertisements and Public Service Advertisements
There are two basic types of advertisements-----commercial advertisements and public service advertisements.
They are similar in that they all appear in newspapers, magzines and on the Internet, the radio and the TV. What’s more, both of them use clever language and attractive pictures.
Apart from the similarities, there also exists differences between them in the following aspects.
Commercial advertisements are put to promote a product or service. They are not altogether innocent，for example, ‘Bright-Teeth fights bad breath.’ However, public service advertisements are to educate people about health, safety or any other problem that affects public welfare. They are helpful and we can learn a lot by following the advice they give, for example, ‘Knowledge changes life.’
In a word, when it comes to advertisements, we must all use our intelligence and not be a slave to them.
As far as I’m concerned, advertisements inform us of the latest products. We should treat advertisements wisely.
这是一篇正反观点类作文，所选话题贴近考生日常生活。要求考生就公益广告与商业广告的差别进行讨论。要点基本都已经给出，只需翻译，在翻译过程中注意适当运用模板句型，使用一些高级短语和词汇，恰当使用衔接过渡词，变换使用多种句型。