题目

So far all cloned animals have suffered from some different serious disorders, ________ dying soon after birth. A.many of which  B.many of whom C.many of them  D.many of that 答案:C解析:由于空格后面是非谓语动词dying,而不是谓语动词,由此可以排除A、B两项;另外,C项中的them代指前面的名词animals,D项的that 显然代指不当。因此答案是C项,为独立主格结构。将12吨煤炭从甲城运送到乙城,平均每次运的重量和需要运的次数A.不成比例B.成正比例C.成反比例D.无法判断
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