题目

阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。 Food has always been oneof the greatest wants of humankind. The search for food is the 1 human behavior. Thus, 2 food were easier to get and prepare, it wouldbe really 3 tohumankind. It would reduce a great burden (负担). The development of processed foods (加工食品) has made food easier to get and prepare. 4 every coin has two sides. Apart from itsadvantages, the 5 ofcooking also has its disadvantages. Though processed foodsseem a great way to save 6, they offer m横断山区，山河纵列，主要大河自西向东依次是A．澜沧江、怒江、金沙江、雅鲁藏布江B．雅鲁藏布江、怒江、澜沧江、金沙江C．雅鲁藏布江、澜沧江、怒江、金沙江D．怒江、雅鲁藏布江、澜沧江、金沙江