举一反三：
1．Advertisement plays an informative role in our daily life．
2．In the past，letters played a decisive role in long-distance
communication．But now ，telephone，email，fax have taken their place．
III．With the development of．．．，随着……的发展，例如：
1．With the development of our economy，many Chinese families can afford a car．
2．With the development of our economy and society，pollution is more and more serious．
3．With the rapid development of science and technology，people can get a college degree by taking
online-courses at home．
4．With the current social and technological developments，employees with more knowledge and higher
academic degrees are needed．
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