下面是是2013年9月12日的SAT官方每日一题的内容，是关于写作方面的，题型是改进句子。SAT官方每日一题是collegeboard每天都会发布的题目，关于SAT考试的三个部分的各个题型。大家和无忧小编一起来看一下这个SAT官方每日一题吧。

　　SAT官方每日一题之写作---改进句子：

　　Writing > Improving Sentences

　　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.

　　Before she became a major rock star capable of filling stadiums, she  sings in little-known clubs and as a back-up singer for other acts.

　　(A) sings

　　(B) has sung

　　(C) is singing

　　(D) had sung

　　(E) has been singing

　　The correct answer is D

　　Explanation

　　Choice (D) is correct. It avoids the verb tense error of the original by providing the past perfect tense verb phrase “had sung” to indicate an action that was completed before another action (e.g., “became a major rock star”) in the past.

　　下面是一道和SAT官方每日一题相似的题目，供大家练习：

　　Woody Guthrie wrote and adapted more than a thousand songs, many of them are about the struggles of workers and the poor in the United States.

　　(A) many of them are

　　(B) many of which are

　　(C) many are

　　(D) which are, many of them,

　　(E) and many of them that are

　　The correct answer is B

　　Explanation

　　Choice (B) is correct. It avoids the comma-splice error of the original by using the pronoun “which” in place of the pronoun “them,” thereby turning what was originally an independent clause (“many of them are … United States”) into a relative clause that modifies “songs.”

　　以上就是关于2013年9月12日SAT官方每日一题中写作改进句子的详细内容，包括了题目和选项以及答案，后面附有一道相关的练习题。大家可以在备考SAT的过程中关注SAT每日一题的内容，这样就可以更好有不间断的练习，也就能在日积月累的过程中得到提高。