parallel structure (i only put the corrected part in the answers)

What a cockroach soils is way more than it consumes

A cockroach soils way more than it consumes

The skipper had a harsh voice, a weatherbeaten face, and was very stocky in build.

a very stocky build

One of the accident victims suffered a broken arm, several broken ribs, and one of her lungs was punctured

and a punctured lung

As time passed, she was torn between her love for her parents and her husband.

and her love for her husband

She spoke about her experience in Australia and several predictions about her country's future.

and made several predictions about her country's future

Pioneers came with hopes of being happy and free and to make their fortunes in the new world.

and of making their fortunes in the new world

The players were annoyed not so much by the decisions of the officials as the hostile crowd

as by the hostile crowd

Cats can catch rabbits as easily as dogs.

as dogs can catch rabbits.

North America boasts about sixty, but only two in Great Britain.

but Great Britain has only two

The team both felt the satisfaction of victory and the disappointment of defeat.

felt both

This was a much harder assignment for me than Luis.

for me than for Luis

Her friends not only were shocked by her failure but they felt a great disappointment.

friends were not only shocked.... but also greatly disappointed

The speech of cultivated Britishers is not so different as it used to be from Americans.

from that of Americans

This author's style is not much different from other writers of this time.

from that of other writers of this time

Cockroaches may be dark brown, pale brown, or of a green color that is delicate.

or delicate green

The ambassador didn't know whether the President had sent for him or the Secretary of State.

or for the Secretary of State

A cloudy day is better for a game than sunshine.

than a sunny day.

Little children are more trouble in the boat than the beach.

than on the beach

The reaction of the students to the new regulations was more violent than the faculty.

than that of the faculty

The classrooms on the second floor are always cleaner than the first floor.

than the ones on the first floor

Te trail on the north side of the mountain is steeper than the south side.

than the trail on the south side.

The unexpected cooperation of China was a greater surprise to Russia than the United States.

than to the United States

They not only are found in urban areas but tropical.

they are found not only.... but also in tropical areas

She not only was industrious but she could be depended on.

was not only...but also dependable