请教下0301的一道阅读....

tititalinUID: 2204754

麻烦各位给看看...
0301阅读的第15题...~~~

The origins of nest-building remain obscure, but current observation of nest-building
activities provide evidence of their evolution. Clues to this evolutionary process can be found in the activities of play and in the behavior and movements of birds during mating, such as incessant pulling at strips of vegetation or scraping of the soil. During the early days of the reproductive cycle, the birds seem only to play with the building materials. In
preparation for mating, they engage in activities that resemble nest-building, and continue these activities throughout and even after the mating cycle. Effective attempts at construction occur only after mating.
Although nest-building is an instinctive ability, there is considerable adaptability in
both site selection and use of materials, especially with those species which build quite elaborate constructions. Furthermore, some element of learning is often evident since younger birds do not build as well as their practiced elders. Young ravens, for example, first attempt to build with sticks of quite unsuitable size, while a jackdaw's first nest includes virtually any movable object. The novelist John Steinbeck recorded the contents of a young osprey nest built in his garden, which included three shirts, a bath towel, and
one arrow.
Birds also display remarkable behavior in collecting building materials. Crows have
been seen to tear off stout green twigs, and sparrowhawks will dive purposefully onto a branch until it snaps and then hang upside down to break it off. Golden eagles, over generations of work, construct enormous nests. One of these, examined after it had been dislodged by high winds, weighed almost two tons and included foundation branches almost two meters long. The carrying capacity of the eagles, however, is only relative to their size ant1 most birds are able to carry an extra load of just over twenty percent of their body weight.

15. Which of the following birds are mentioned as those that build nests that include unusual
objects?
(A) Ravens
(B) Ospreys
(C) Crows
(D) Sparrowhawks

我怎么没在原文发现?!.... 答案选的C....????
谢谢指教!

cici1114UID: 2178160

Crows have been seen to tear off stout green twigs, and sparrowhawks will dive purposefully onto a branch until it snaps and then hang upside down to break it off

tititalinUID: 2204754

那Crows 和 sparrowhawks都应该选啊....

tititalinUID: 2204754

有的地方答案是B....到底哪个更准确些?!....
大家给看看....麻烦!!!

谢谢!@!!@

duanfaguwei612UID: 2214861

题目是：unusual objects
所以应该是Crows

flzzzUID: 2227097

....green twig怎么是unusual objects了?....这个解释牵强了点哈..同问

flzzzUID: 2227097

知道了
个人强烈觉得是B啊
明显shirts..才是unusual的@_@5#的XD~

netfox_newUID: 2234261

考虑到unusual objects
应该是 three shirts, a bath towel, and one arrow.
所以是osprey

stout green twigs太常见了吧

tititalinUID: 2204754

顶! 请教斑竹...

lmhatgreUID: 2978637

选B吧。