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题库 / Prep2008E2-SC-234
The coyote is one of several recent ecological success stories: along with the white-tailed deer, the moose, and other species that are enlarging their natural domains, they have established themselves as supreme adapters in an era when the capability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals.
they have established themselves as supreme adapters in an era when the capability
they have established themselves as being supreme adapters in an era when being able
it has established itself as a supreme adapter in an era when to be able
it has established itself as being a supreme adapter in an era when its ability
it has established itself as a supreme adapter in an era when the ability
看清主语是The coyote，along with xx，xx and xx是从句，排除AB
C：when引导的定语从句后面不定式做主语to be able to adjust指未来能调整这件事，不能接has created，时态冲突了，错误。
D&E的区别是its ability还是the ability，结合when前面主句的句意来看，竹居士说它使自己成为一个超级适应者在一段时期内，这一段时期应该是在讲它的能力怎么样，用its ability更为合适。
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