题目

Greening the Kubuqi DesertChina has seen great achievements in improving the environment and green development over the past 70 years. Solid efforts have been made to fight pollution and continuously improve the environment.【1】 It caused deadly sandstorms, which arrived like big black walls reaching up into the sky.As President Xi Jinping has said, clear waters and green mountains are invaluable assets（资产）. 【2】A series of campaigns have been carried out by the central government to improve the environment. 【3】 Thanks to the program, forest coverage in China had increased frWhat do you usually feed your cat ________? [　　] A． with　　　B． at　　　C． to　　　D． of