根据上下文意思，完成下列空格。

    Nowadays, advertisements can be seen everywhere. They have made a really bad  I____on people for various reasons. First of all, their constant  ____(出现)on different media disturbs people's normal life. Besides, the skillful methods are used so ____(频繁地)to cheat consumers that they have great difficulty d____useful information from lies. However, despite the s____mentioned above, advertisements do play an important role in our daily life. With different products being developed everyday, advertisements make it more ____(方便的）for consumers to get necessary information and make comparisons, thus purchasing the best goods. What's more, public service advertisements, or PSAs, provide people with e____about health, safety, or any other problem that affects public welfare. By dealing with widespread s____concerns, they lead us better lives. ____(因此), instead of blaming advertisements all the time, we have to admit that they are indeed b____to each person as well as the society.