3、.A./;anB.a;anC.the;anD.a;/【解析】B:Demand作为要求和请求时为可数名词;作为需要需求时为不可数名词,在惯用法中既可以说muchdemand,也可用 great/rising等形容词修饰,此时前面用不定冠词。Material与此类似。4.Moreandmorepeoplein China prefertochoose___cheapwirelessphoneserviceknownas____"LittleSmart".Aa;/B.a;theC.the;theD.the;/【解析】A: