题目

In America, 95% of pet owners think of their animals as family m________(成员). 答案：【答案】members【解析】句意：在美国，95%的宠物拥有者视他们的宠物为家庭成员。成员：member，是可数名词，此句主语owners以及宾语animals都是复数，指一个群体。故空处也是复数，故答案为members。人的听觉频率范围在________Hz到_______Hz之间．