Answer:
crew
Explanation:
Collective nouns are nouns that are normally in its singular form but that refers to more than one person, animal, thing or concept considered a single entity because they share one or more characteristics.
"Crew" is an example of a collective noun because this noun it's singular but it refers to a group of two or more persons organized for some specific purpose.
Some other examples of collective nouns are team, congregation, class, herd, flock, gang, mob, group, and family.
A. predicate adjective
B. predicate nominative
rescue : emergency
scientist : microscope
horse : blacksmith
farmer : agriculture
librarian : book :: scientist: microscope
As I see it, the librarian's profession is comprised of books. Like a librarian uses books to do her job. Whereas, a scientist does his job with the help of microscopes.
B. He is confident and proud, but hasty.
C. He is reasonable and honorable, but troubled.
D. He is smart and reliable, but thirsty for power.