完形填空
Most of us have three meals a day. We take food for granted. And we don't think about it. 【C1】______experts argue a food crisis is coming. This crisis is going to make us【C2】______the way we think about food. Food is in great need【C3】______a growing of world population. By 1960, the population was three billion. It doubled to six billion by 1999. By 2050, this planet will need to【C4】______at least nine billion people. As a result, the food prices get higher and higher. So, what can a【C5】______, crowed world do? One suggestion is to eat【C6】______meat. Meat uses more natural resources than grains. It requires more【C7】______to produce one pound of meat than to produce one pound of grain. It also requires between 5 and 10 times more【C8】______than vegetables. So, eating less meat will【C9】______more land for farming, and it will save water. To eat less meat, people will need to change their eating habits. That will not be【C10】______Americans, for example, have【C11】______loved meat. In general, they eat twice as much meat as people in other countries. At the same time, in developing countries like China and Brazil, sales of meat have doubled in the last 20 years.【C12】______will double again by 2050. Growing need of meat will【C13】______to put pressure on natural resources. World population is increasing, resources are becoming fewer, and food prices are rising. Therefore, we need to rethink【C14】______we eat every day. For meat lovers, we don't need to give up meat【C15】______. But we need to eat more grains and less meat.