Question the-li
The Lion Light system, developed by Kenyan inventor Richard Turere, consists of LED lights installed around the perimeter of livestock pastures. Powered with blank the blinking LEDs keep lions away at night, thus protecting the livestock without risking harm to the endangered lions.
Which choice completes the text so that it conforms to the conventions of Standard English?
energy collected, by solar panels, during the day
energy collected by solar panels during the day
energy collected by solar panels during the day,
energy, collected by solar panels during the day,
The Lion Light system, developed by Kenyan inventor Richard Turere, consists of LED lights installed around
Hard-difficulty · SAT Reading & Writing · Boundaries — Parenthetical punctuation: commas, dashes, parentheses. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice C is the best answer. The convention being tested is punctuation between a supplementary phrase and a main clause. This choice correctly uses a comma to mark the boundary between the supplementary phrase (“powered…day”), which describes how the LEDs are powered, and the main clause (“the blinking…night”).
Choice A is incorrect because it fails to mark the boundary between the supplementary phrase and the main clause with appropriate punctuation. Furthermore, placing commas around the phrase “by solar panels” suggests that it could be removed without affecting the coherence of the sentence, which isn’t the case. Choice B is incorrect because it fails to mark the boundary between the supplementary phrase and the main clause with appropriate punctuation. Choice D is incorrect. Placing commas around the phrase “collected by solar panels during the day″ suggests that it could be removed without affecting the coherence of the sentence, which isn’t the case.
More Boundaries practice questions
- Award-winning cinematographer James Wong Howe was known for his innovative filming
- Dr. Rocío Paola Caballero-Gill is a paleoceanographer. This means that Dr.
- Nigerian American artist Toyin Ojih Odutola uses black-ink pens to create highly detailed
- The city of Pompeii, which was buried in ash following the eruption of Mount
- Eli Eisenberg, a genetics expert at Tel Aviv University in Israel, recently discovered
- By the time Hawaiian king Kamehameha IIwe ______ blank the throne, the number of
- Why are Rome’s famous concrete structures, such as the Colosseum, still standing
- In 1637, the price of tulips skyrocketed in Amsterdam, with single bulbs of rare
Browse all Expression of Ideas practice questions or return to the full SAT question bank.