GWD22

Almost like clones in their similarity to one another, the cheetah species’ homogeneity makes them especially vulnerable to disease.

1. the cheetah species’ homogeneity makes them especially vulnerable to disease
           
2. the cheetah species is especially vulnerable to disease because of its homogeneity
           
3. the homogeneity of the cheetah species makes it especially vulnerable to disease
           
4. homogeneity makes members of the cheetah species especially vulnerable to disease
           
5. members of the cheetah species are especially vulnerable to disease because of their homogeneity

**GWD22提供的答案是E

怎么觉得这个句子这么难懂呢？

考察的是逻辑主语。their不能代表species和homogeneity.只能代表members.