Helping Verb

[FuM520]

In the book " 6th Sentence Correction" P202：

Wrong: Our cars were designed to inspire envy, and they ARE.

Right: Our cars were designed to inspire envy, and they DO (= do inspire envy)

In the " Wrong" version , what is the problem ? I am confused about the explanation in Manhattan SC book since it says " They Do inspire is acceptable, but they ARE is not grammatical"

However, my understanding is " Our cars were designed to inspire envy, and they ARE ( designed to inspire envy ) "

Whether the reason behind my question is that " This sentence wants to express an emphasis, thus, only " DO" could be used here ?

Hope reply

[FuM520]

Hi, Experts~

Hope a reply about this question, it really confused me

[FuM520]

Oh.. I just got an idea

" Our cars were designed to inspire envy, and they ARE ( designed to inspire envy ) "
In this sentence, there is no reference of "they", and the whole meaning is so redundant.

Right?

[Sage Pearce-Higgins]

Apologies for the slow reply. Please search the forums before posting; here's a reply to a similar question https://www.manhattanprep.com/gmat/foru ... ed#p127864

As for the word "they", it refers back to "our cars" so that it's fine.