单选题
According to the passage, the total supply of food in America every year reaches ______.
【正确答案】
D
【答案解析】细节题。本题答案在文章第二段：“…yet the government estimates that we waste almost 100 billion pounds of food each year，more than one-quarter of our total supply．(政府估算我们每年都会浪费掉几乎1000亿磅的食物，这超过我们年食物供应总量的 1/4。)”，由此可推出美国每年食物供应总量应是大约4000亿磅，即D选项about 400 billion pounds。