gwd-21-39

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

CDGWD22提供的大案是E，我认为答案是B，species既可以是单数，也可以是复数

首先，根据like clones in their similarity中的their，判断clone是克隆体的意思，因此排除A/C/D。
E错误的原因是后面的their与前面的their指代的对象不同。

open to discuss

根据单复数的关系，可以排除 b c

i vote e, 把两句话前后顺序换过来看看，就会发现 e 是将homogeneity 和 clones 做了最完美的比较

1. members of the cheetah species are especially vulnerable to disease because of their homogeneity[h1] 

39. GWD-21-Q39:

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[h1] 

2. the cheetah species is especially vulnerable to disease because of its homogeneity[h2] 

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[h3] 

   Answer: