16. That city has one of the most ………………. underground rail networks in the world. A. efficient B. fashionable C. cosmopolitan D. fascinated

That city has one of the most ………………. underground rail networks in the world

a) efficient

A

Explanation:

you would most likely hear someone say that a city has an efficient underground rail networks than the rest.

fashionable wouldn't make as much sense because underground rail networks don't have this quality.

cosmopolitan wouldn't work because underground rail networks wouldn't be a group of people

fascinated wouldn't work because no one is being fascinated by it in the sentence

well stockyards mean a large yard containing pens and sheds, typically adjacent to a slaughterhouse, in which livestock is kept and sorted. and i'm assuming that by party you   mean a large group of people which does make sense because chicago is a very crowded place much like new york. stockyards tend to take up a lot of room due to needing the area for pens to keep animals in and the fact that stockyards are usually right by slaughterhouse where they process and distribute the product. so its much like a zoo but with some dead animal products close by.

it is an infinitive phrase with a subject.