prep sc-74

wakesleep2011

同上发

wakesleep2011

Paleontologist Stephen Jay Gould has argued that many biological traits are not the products of natural selection, favored due to their enhancement of reproduction or survival, but that they are simply random by-products of other evolutionary developments.

(A) due to their enhancement of reproduction or survival, but that they are

(B) due to the reproduction or survival they enhance, but they are

(C) because they enhance reproduction or survival, but

(D) because they enhance reproduction or survival, but are

(E) because of enhancing reproduction or survival, but are

答案是d，我选的c，既然not在are之后，那么but与not平行，故but直接就是表语，为什么还要有are？

whopawo

are not 。。。 but are。。。