单项选择题
A．customers B．increased sales C．the producer D．reduced prices
28（）A．tryingB．tryC．trialD．the trial
单项选择题28（）
A．trying B．try C．trial D．the trial
Advertisement can increase demand （）A．all the timeB．in ...
单项选择题Advertisement can increase demand （）
A．all the time B．in any circumstances C．in a growing market D．in a shrinking market
The word "media" in the first paragraph includes （）A．th...
单项选择题The word "media" in the first paragraph includes （）
A．the press B．television C．radio D．all of the above
