SAT Practice6f73ae1d-2a53-4dd9-b5ea-b1b1c2f3b734
Practice one SAT question at a time
Questions come from the Bluebook question bank.
US traffic signals didn’t always contain the familiar three lights (red, yellow, and green). Traffic lights only ______blank red and green lights until the three-light traffic signal was developed in the 1920s.
Which choice completes the text with the most logical and precise word or phrase?