SAT Digital Diagnostic
Page 2 of 5
Question 3
In 2011, the Kepler space telescope detected a planet orbiting two stars. This phenomenon, known as a circumbinary planet, was once thought to be a staple of science ______ it has since been confirmed as a common celestial occurrence.
Which choice completes the text so that it conforms to the conventions of Standard English?
Advertisement
Question 4
In 1934, physicist Eugene Wigner posited the existence of a crystal consisting entirely of electrons arranged in a honeycomb-like structure. The so-called Wigner crystal remained largely ______ until 2021, when researchers finally captured an image of one.
Which choice completes the text with the most logical and precise word or phrase?
Advertisement
SAT Expert Tip: Punctuation Boundaries
On the Digital SAT, "Boundary" questions test how you link two independent clauses. If you use a transition word like "however" to start a new sentence, you must use a semicolon or period before it, and a comma after it. This is a high-frequency rule that can earn you easy points!