Free SAT Practice Question

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ID: SAT-RW-SEC-048
Section: SAT Reading & Writing (RW) – Standard English Conventions
Topic: Form, Structure, and Sense
Difficulty level: Medium

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Since 2016, the small coastal observatory ______ its main telescope three times and plans to upgrade it again next year, steadily sharpening the images it captures of distant galaxies.

Which choice completes the text so that it conforms to the conventions of Standard English?

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