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题库 / GMATLA-CR-26
Each year red-winged blackbirds stop in a certain region of Midland Province on their spring and fall migrations. In the fall, they eat a significant portion of the province's sunflower crop. This year Midland farmers sought permits to set out small amounts of poisoned rice during the blackbirds' spring stop in order to reduce the fall blackbird population. Some residents voiced concern that the rice could threaten certain species of rare migratory birds. Nevertheless, the wildlife agency approved the permits.
Which of the following, if true, most helps to justify the wildlife agency's approval of the permits, given the concerns voiced by some residents?
In the region where the red-winged blackbirds stop, they are the first birds to be present in the spring.
The poison that farmers want to use does not kill birds but rather makes them incapable of producing viable eggs.
Since rice is not raised in Midland Province, few species of birds native to the province normally eat rice.
Without the permit, any farmers shown to have set out poison for the blackbirds would be heavily fined.
The poison that farmers got approval to use has no taste or smell that would make it detectable by birds.
A: red-winged 和其他的候鸟共同落脚的地方，red-winged先落脚，说明他们可以把饲料吃完，不影响到后面的。正确
B: 毒药让鸟不能下蛋，也会让其他濒危的候鸟面临危险。 -> 选B的错误原因，是简单地把 threaten 和 杀死 联系起来。看到“仅仅不下蛋而不杀死”，就觉得这个可以justify了。但是不下蛋和杀死几乎有一样的作用。解决办法：选好以后，反过来再验证一下。看着像的，一般都是坑。
C：担忧的是会不会威胁到其他迁徙的的后年，和本地鸟没关系
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