填空题 Brokers buy and sell 1 behalf 2 people and companies. Their unique position is due 3 their knowledge 4 the market they specialize, and the membership 5 the exchange they work 6. Their-fee is usually 7 the form 8 a commission 9 the sales or purchases they make 10 their clients 11 this way commission agents are like brokers. Merchants, however, buy 12 their own account, then sell 13 their own countries 14 the best prices they can get 15 the product. Their reward is based 16 profit rather than 17 commission.