Names and numbers were causing trouble long before the Internet age. Biology had a naming crisis in the 17th and 18th centuries. The problem wasn’t so much a shortage of names but an excess of (19) ----. Plants and animals (20) ---- by many different names in different places. Then came the great reform of Carolus Linnaeus and his system of Latin binomials, (21) ---- each organism by genus and species. The new scheme revolutionized taxonomy, not because there is any magic in Latin or in two-part names, but because Linnaeus and his (22) ---- laboured to preserve a strict one-to-one mapping between names and organisms. Official codes of nomenclature continue to enforce this rule – one name, one species – although rooting out synonyms and homonyms is a (23) ---- struggle.
19.
A) them
B) that
C) theirs
D) those
E) themselves
20.
A) were to be known
B) would be known
C) are known
D) were known
E) will be known
21.
A) to have been identifying
B) identified
C) to have identified
D) to be identifying
E) identifying
22.
A) participants
B) followers
C) occupants
D) suppliers
E) practitioners
23.
A) constant
B) primary
C) rapid
D) similar
E) partial

Then came the great reform of Carolus Linnaeus and his system of Latin binomials, ---- each organism by genus and species.

21.
A) to have been identifying
B) identified
C) to have identified
D) to be identifying
E) identifying

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Then came the great reform of Carolus Linnaeus and his system of Latin binomials which identified each organism by genus and species.
active reduction yapılmış E olmalı.

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