2015-2016学年译林版高中英语必修4_Unit1+Advertising++Word+power(共25张PPT)
2015-2016学年译林版高中英语必修4_Unit1+Advertising++Word+power(共25张PPT)第3页

How could Mr Li Yang know that you need these books? How could he sell so many books to you?

Brain storming:

Through market research (市场研究/调查).

By advertising in lectures.