第18题: [单项选择]Some of our clients have complained that the time it takes to get a ______ from a service representative is enough to make them not want to use our services again. A. response B. responding C. responded D. respond 参考答案:A 答案解析:本题需选择适当的词形。横线处被from a service representative(从服务人员)修饰,充当get的宾语。因此名词(A)response最恰当。