Question

examining catalog records from the british library ____ how marginal annotations shape the interpretation of medieval sermons. several volumes from the cotton collection contain glosses added by later readers. a 2014 survey documented over 600 annotations that altered doctrinal emphasis across copied texts.
19
which choice completes the text so that it conforms to the conventions of standard english?
a reveal
b reveals
c have revealed
d were revealing

Explanation:

The subject of the sentence is "Examining catalog records from the British Library", which is a gerund phrase acting as a singular subject. In Standard English, a singular subject takes a singular verb. "Reveals" is the singular form of the verb "reveal" in the present tense, which matches the singular subject. Option A is plural, option C is plural (and in present perfect which doesn't fit the context as well), and option D is past continuous which is incorrect here.

Answer:

B. reveals