13. In Britain people _______ four million tons of potatoes every year.       A. swallow   B. dispose   C. consume   D. exhaust swallow  吞咽，吞食 swallows  燕子gulp  吞吃sway  摆动sword  剑sweep  打扫weep  哭泣swing  摇动，摆动 dispose  处理，使愿意be disposed to do  愿意做某事at your disposal  随时愿意为您服务disposition  气质，性情