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CollegeBoard SAT每日一题 6月8日.

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SAT试题类型 Writing > Improving Sentences Part of the following sentence is underlined; beneath the sentence are five ways of phrasing the underlined material. Select the option that produces the best sentence. If you think the original phrasing produces a better sentence than any of the alternatives, select choice A. Although biologists have made tremendous progress in mapping the human genome, the genetic roots of most common diseases remained largely elusive. (A) remained (B) had remained (C) remain (D) are remaining (E) remains 答案:C Explanation Choice (C) is correct. It avoids the verb tense error of the original. The past tense verb “remained” is not consistent with the present perfect tense verb “have made” and should be changed to the present tense verb “remain.”

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