Modded SAT Question Bank
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Test
Reading and Writing
Domain
Standard English Conventions
Skill
Form, Structure, and Sense
Difficulty
Hard
ID: a14eef71
Modded SAT Question Bank by Abdullah Mallik

In 2015, a team led by materials scientists Anirudha Sumant and Diana Berman succeeded in reducing the coefficient of friction (COF) between two surfaces to the lowest possible level—superlubricity. A nearly frictionless (and, as its name suggests, extremely slippery) state, blank

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

  1. when their COF drops below 0.01, two surfaces reach superlubricity.

  2. two surfaces, when their COF drops below 0.01, reach superlubricity.

  3. reaching superlubricity occurs when two surfaces’ COF drops below 0.01.

  4. superlubricity is reached when two surfaces’ COF drops below 0.01.

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Correct Answer: D
Rationale

Choice D is the best answer. The subject of the modifier “a nearly frictionless state” is “superlubricity.” Subject-modifier placement requires a modifier and its subject to be next to one another, so “superlubricity” must be the first word in the missing clause.

Choice A is incorrect. This choice creates a subject-modifier placement error. The subject of the modifier “a nearly frictionless state” is “superlubricity.” Subject-modifier placement requires a modifier and its subject to be next to one another, so “superlubricity” must be the first word in the missing clause. Choice B is incorrect. This choice creates a subject-modifier placement error. The subject of the modifier “a nearly frictionless state” is “superlubricity.” Subject-modifier placement requires a modifier and its subject to be next to one another, so “superlubricity” must be the first word in the missing clause. Choice C is incorrect. This choice creates a subject-modifier placement error. The subject of the modifier “a nearly frictionless state” is “superlubricity.” Subject-modifier placement requires a modifier and its subject to be next to one another, so “superlubricity” must be the first word in the missing clause.

Question Difficulty: Hard
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