题目

Most of the artists ____________ to the party were from South Africa．［MET90］  A．invited B．to invite  C．being invited  D．had been invited    答案：A句中的most of the artists与invited之间是被动关系，故应选用过去分词，相当于who were invited，  下表为小明在“测定液体密度”的实验中记录的数据．实验次数1234液体体积/cm320406080液体和容器的总质量/g406080M根据表中数据可得液体密度是________，容器的质量为________，M=________g．