Question

So far all cloned animals have suffered from some different

Answer 1

C

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。