In section 3 of practice test 10 in second edition of the BB, there is a question (32) that reads:
32. Which of the following is the best version of sentence 7 (reproduced below)?
What was noteworthy about this was that it was then possible for people to use elevators, not just freight.
a) as it is now
d) this development was noteworthy because elevators could now be used for people as well as for freight. (correct answer)
I deliberated between these two choices and finally went with choice a because "elevators could be used for people" just sounded awkward to me. Isn't the idiomatic expression "elevators could be used by people"? Or is it just me? Someone please explain or give me an example! Thanks