Research on the reintroduction of large carnivores such as bears and wolves has implications both for the modern-day debate over the appropriateness of reintroduction programs and for the historical debate over what happened 10,000 to 50,000 years ago when one particular predator, human beings, expanded their territory and encountering large numbers of native prey.
human beings, expanded their territory and encountering
human beings, expanded their territory to have encountered
the human being, expanded its territory and encountered
the human being, had expanded its territory to encounter
the human being, had expanded their territory and encountered
还是不能理解为什么expand和encounter不能并列。人类也可以是因为其他目的去expand然后恰巧encounter了更多的动物。CD时态不同,能讲下这句怎么从时态判断吗?
这是一个挺好的问题。一定要从设置GMAT这个考试的逻辑上来思考这个问题。GMAT不想让我们成为语言学家,而是想考查我们的逻辑思维能力,所以我们要选择逻辑上最合理的选项。这道题目中,“扩大领土”和“遇到更多猎物”之间至少不应该是并列,这是两个完全不同层级的动作。例如:
我们可以说:
小明去跑步并且去跳绳。
但一般不说:
小明去跑步并且去锻炼身体。
第二个例句会被理解为跑步并不是锻炼身体。虽然你也可以说,跑步“恰好”锻炼了身体,但逻辑上并不是最好的。
尽量不要从时态的角度来判断考题,尤其是在过去时和过去完成时之间选择。因为从原则上来说,如果我们想突出是过去的过去,那就用过去完成时,但如果不想突出,就可以直接用过去时。所以,判断起来,非常随性。
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