【易伯华每日一练】SAT语法句子改进题（18）

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从2014年9月开始，易伯华教育将推出每日一题系列项目，借此帮助各位考生更好地备考SAT考试，我们也将在第一时间内提供题目的答案与解析。希望大家积极参加练习，努力提高自己的写作能力！小伙伴们一起来做题吧！来看看今天为大家带来的SAT句子改进题目。

Part or all 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

正确答案：C

解析：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.”