What form of the verb 'use' correctly completes the passage to reflect the present-day context?
Answer:Historically, deep-sea oceanographers relied on simple sounding lines to measure depth. Today, researchers 【use】 advanced sonar systems to map the ocean floor with extreme precision.
Answer
use
The correct verb form is 'use'. The passage begins with a historical context ('Historically... relied') but shifts to the present day in the second sentence, as indicated by the temporal marker 'Today'. Because the subject 'researchers' is plural, the plural present-tense form 'use' is required to maintain grammatical consistency and agreement.
Step-by-Step Solution
Key Concept
Verb Tense, Aspect, and Mood