In addition, there is one 25-minute unscored section, known as the variable or equating section. This unscored section may be either a critical reading, math, or writing multiple-choice section. This unscored section does not count toward the final score, but is used to try out new questions for future editions of the SAT and to ensure that scores on new editions of the SAT are comparable to scores on earlier editions of the test.
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A relative clause is a clause that begins with a relative pronoun such as who, whom, whose, which , or that , or a relative adverb such as when, where , or why . A relative clause can be essential or nonessential. A relative clause is essential when you need the information it provides. A relative clause is nonessential when you do not need the information it provides. An essential relative clause does not require a comma to separate it from the rest of the sentence. A nonessential relative clause does require a comma to separate it from the rest of the sentence.