【正确答案】A: In my opinion, high quality of service is the most important thing when choosing a delivery company. Anyway, we have to think about the cost. We must calculate whether the service is worth that much. When we are delivering something urgent, we should also consider the speed of delivery.
B: In my opinion, the choice will be made depending on different situations. While making an order over telephone is fast and timesaving, it lacks the physical record of an order received on paper. To solve this problem, we can use fax. But it's not always available. If your order is not urgent, sending letters will be all right.