单选题So far all cloned an

问题补充：

单选题Sofarallclonedanimalshavesufferedfromsomedifferentseriousdisorders,______dyingsoonafterbirth.A.many of whichB.many of whomC.many of themD.many of that

答案：

C解析考察独立主格结构。独立主格结构不是句子，是短语，但是它的作用相当于句子。many of them dying soon after birth= and many of them are dying soon after birth.本句题干中缺少连词，说明后面不是句子，排除AB. that指代单数名词，而这里的them指代的all cloned animals，应该使用复数形式。