Unit4 Great ideas

重点词汇：

brainstorming, eBay, corporation, retailer, operator, telecommunication, turnover, effervescent, catalog, headquarter, symptom, agenda, comprehensive, outlet, swimming goggles, launch, promotion, protean, gadget, memo, commercial. 

重点短语：

take advantage, raise status, make a breakthrough, extend the product range, enter a market, enhance status, fill a gap, out of the blue, in favor of, come up with.