请教prep143平行问题

143. By pressing a tiny amount of nitrogen between two diamonds to a pressure of 25 million pounds per square inch, scientists not only were able to transform the gas into a solid, but they also created a semiconductor similar to silicon.

A. not only were able to transform the gas into a solid, but they also created

B. not only were able to transform the gas into a solid but also creating

C. were able not only to transform the gas into a solid but to create (C)

D. were able not only to transform the gas into a solid but also creating

E. were not only able to transform the gas into a solid, but they were also able to create

不明白E哪里不平行,

E not only able to transform…but they were also able to create不平行，

应该 scientists were not only able to transform….they were but also able to create….,但they were but also...太别扭了,不知道正确的形式应该是什么?请教了!感谢!

E not only able to transform…but they were also able to create不平行，

应该 scientists were not only able to transform….they were but also able to create….,但they were but also...太别扭了,不知道正确的形式应该是什么?请教了!感谢!

是(were able)not (only) to....but to ...

即, not...but...结构,

不是not only....but also...

OG 10th Edition SC 125. The winds that howl across the Great Plains not only blow away valuable topsoil, thereby reducing the potential crop yield of a tract of land, and also damage or destroy young plants.
(A) and also damage or destroy
(B) as well as damaging or destroying
(C) but they also cause damage or destroy
(D) but also damage or destroy
(E) but also causing damage or destroying

Answer to Question 125
Choice D, the best answer, correctly employs the correlative construction not only x but also y, where x and y
are grammatically parallel and where both x and y (damage and destroy) apply to young plants. Choices A,
(not only ... and also), B (not only ... as well as), and C (not only ... but they also) violate the not only ... but
also paradigm. Moreover, B contains terms (blow... damaging) that are not parallel. In C and E, damage is
used not as a verb with young plants as its direct object but as a noun receiving the action of cause; consequently, these choices fail to state explicitly that the damage is done to young plants. E also violates
parallelism (not only blow ... but also causing).

not only ... but also ... 结构里的also可以省略。C的parallel最好。E除了上述的错误，还有个毛病是不简洁。

问一下,1,not only...but also可以省略not only...but..(要求平行)

2,not only....but also中间打段或插入其他对不对?were not only able to transform the gas into a solid, but were also able to create..这样对吗?