下面是2013年10月15日的SAT官方每日一题的内容，是关于写作方面的，题型是句子改错。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。下面我们就一起来看一下这个SAT官方每日一题吧。

　　SAT官方每日一题之写作---句子改错：

　　Writing > Identifying Sentence Errors

　　The following sentence contains either a single error or no error at all. If the sentence contains an error, select the one underlined part that must be changed to make the sentence correct. If the sentence contains no error, select choice E.

　　Salt A(is valued) not only because of its properties B(as a condiment) and preservative, C(but) it is D(essential to) the health of humans and animals. E(No error)

　　(A) A

　　(B) B

　　(C) C

　　(D) D

　　(E) E

　　The correct answer is C

　　Explanation

　　The error in this sentence occurs at (C), where there is an improper idiom. In order to appropriately complete the correlative construction, the word “also” must be inserted after the conjunction “but.” This results in the correlative construction “not only … but also.” In addition, what follows “not only” must be grammatically parallel to what follows “but also,” so the word “but” should be changed to “but also because.”

　　下面是一道和SAT官方每日一题相似的题目，供大家练习：

　　A(Although) it is not a fast runner, B(wolves) can maintain a loping run for many miles, C(running)throughout the night D(if necessary). E(No error)

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is B

　　Explanation

　　The error in this sentence occurs at (B), where the plural noun “wolves” is used incorrectly as the referent of the singular pronoun “it.” Either “the wolf” or “a wolf” should be used instead.

　　以上就是关于2013年10月15日SAT官方每日一题中写作句子改错部分的详细内容，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。