《商務(wù)英語(yǔ)口語(yǔ)》 task one at the trade fair task two on the phone task three at the airport task four at the hotel task five agenda task six promotion task seven at the company task eight price negotation task nine packing negotation task ten transport negotation task eleven payment negotation task twelve contract task thirteen business dinner task fourteen sightseeing task fifteen seeing-off references