填空题 The London Metal Exchange is made 1 40 seats and is the place where brokers deal 2 one another trading 3 different metals 4 their clients. They trade 5 five-minute periods, 6 example, first copper, then zinc, then lead, and keep 7 contact 8 their firms 9 clerks who stand 10 phones 11 Visual Display Units that give 12 the minute information 13 price movements. The brokers work 14 a commission which is based 15 sales and purchases made 16 their clients.