第11题: [填空题]______(这是一种大家共有的经验) that bodies are lighter in water than they are in air. 参考答案:lf is a matter of common experience/It is an experience shared by everyone 答案解析:[解析] “这”指代的是后面的that从句,可译为It,作形式主语。“大家共有的经验”可译为a matter of common experience或an experience shared by