[問題]T4-Q5-Q7

[洪正緯]

1. T-4-Q5-Q7恐龙进化成鸟
Although many lines of evidence indicate
that birds evolved from ground-dwelling
theropod dinosaurs, some scientists remain
unconvinced. They argue that theropods
(5) appeared too late to have given rise to birds,
noting that Archaeopteryx lithographica – the
oldest known bird – appears in the fossil
record about 150 million years ago, where
-as the fossil remains of various nonavian
(10) maniraptor theropods – the closest known
relatives of birds – date only to about 115
million years ago. But investigators have
now uncovered bones that evidently belong
to nonavian maniraptors dating to the time of
(15) Archaeopteryx. In any case, failure to find
fossils of a predicted kind does not rule out
their existence in an undiscovered deposit.
Skeptics also argue that the fused clavicles
(the “wishbone”) of birds differ from the
(20) unfused clavicles of theropods. This
objection was reasonable when only early
theropod clavicles had been discovered,
but fossilized theropod clavicles that look
just like the wishbone of Archaeopteryx
(25) have now been unearthed. Finally, some
scientists argue that the complex lungs of
birds could not have evolved from theropod
lungs, an assertion that cannot be supported
or falsified at the moment, because no fossil
(30) lungs are preserved in the paleontological
record.

T-4-Q5
The primary purpose of the passage is to

A. compare the development of two hypotheses concerning the evolutionary origin of birds
B. suggest revisions to the standard theory of the evolutionary history of birds
C. evaluate the usefulness of fossil evidence in determining the evolutionary history of birds
D. challenge the theory that birds evolved from ground-dwelling theropod dinosaurs
E. respond to criticisms of the theory that birds evolved from ground-dwelling theropod dinosaurs

小弟就整篇文章看來
C和E在抉擇
C雖說化石佔很大一部份關聯 但從L15-L17(In any case....deposit)沒找到化石並不代表和始祖鳥符合的化石不存在, 所以C 怪怪的
E在文中並未提到理論(我是這樣想的)...但答案卻是E.還是文中第一段已經描述理論的存在.謝謝....請解惑

[dibert8]

是的. 第一句話提供了 theory:
many lines of evidence indicate
that birds evolved from ground-dwelling
theropod dinosaurs

文章流程:引介理論;將三個疑點一一回應.

(C) 如果是評估 usefulness 文章應該有類似 yes/no (有用/沒用)的結論.