题目解析:
题干关于“果树和鱼塘”的组合,下列哪项是正确的?定位 The carp fed on organic matter that either dropped or was thrown into the pond, while the mud scooped up from the pond fertilized the fruit trees and the rice fields and added height to the embankments and more protection for the fishponds.
鲤鱼以掉落或被扔进池塘的有机物质为食,而从池塘里舀出的泥土给果树和稻田施肥,增加了堤岸的高度,为鱼塘提供了更多的保护。故 C 正确;A 错,为了满足丝绸需求没提及;B 错,rice crops were poor.没提及;D 错,replace 代替没提及