求解一道GWD题

qsjvicky

求教一道GWD题:
T-4-Q5-Q7

     Although manylines of evidence indicate that birds evolved from ground-dwelling theropoddinosaurs, some scientists remain unconvinced. They argue that theropodsappeared too late to have given rise to birds, noting that Archaeopteryxlithographica – the oldest known bird – appears in the fossil record about 150million years ago, whereas the fossil remains of various nonavian maniraptortheropods – the closest known relatives of birds – date only to about 115million years ago. But investigators have nowuncovered bones that evidently belong to nonavian maniraptors dating to thetime of Archaeopteryx. In any case, failure to find fossils of a predicted kind doesnot rule out their existence in an undiscovered deposit. Skeptics also argue that the fused clavicles (the“wishbone”) of birds differ from the unfused clavicles of theropods. Thisobjection was reasonable when only early theropod clavicles had beendiscovered, but fossilized theropod clavicles that look just like the wishboneof Archaeopteryx have now been unearthed. Finally, some scientists argue thatthe complex lungs of birds could not have evolved from theropod lungs, anassertion that cannot be supported or falsified at the moment, because nofossil lungs are preserved in the paleontological record.

T-4-Q7

Which of the following is mentioned in the passage as anargument made by scientists who are unconvinced that birds evolved fromtheropod dinosaurs?

A.   There are no known theropod dinosaur fossilsdating from a period after the time of Archaeopteryx.

B.    There are no known theropod dinosaur fossils thatindicate the structure of those dinosaurs’ lungs.

C.   Theropod dinosaurs appear in the fossilrecord about 150 million years ago.

D.   Theropod dinosaurs did not havefused clavicles.

E.    Theropod dinosaurs had certain bones thatlook just like those of Archaeopteryx.

答案选D，可是我选B，B可以从最后一句话推出，可是D只有蓝色字体讲到，也不能推出，求解释！

milk8888

你排版如此不负责任，难道还期盼有网友回复你？发帖之后不检查排版？