下面是2013年3月21日的SAT官方每日一题的内容，是关于阅读方面的，题型是完成句子。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。下面我们就一起来看一下这个SAT官方每日一题吧。

　　SAT官方每日一题之阅读---完成句子：

　　Critical Reading > Sentence Completions

　　Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole.

　　Laboratories have been warned that provisions for animal protection that in the past were merely ------- will now be mandatory;------- of this policy will lose their federal research grants.

　　(A) comprehensive . . adversaries

　　(B) nominal . . advocates

　　(C) disregarded . . proponents

　　(D) recommended . . violators

　　(E) compulsory . . resisters

　　The correct answer is D

　　Explanation

　　The word “merely” indicates that the past provisions were not as strict as the “mandatory” provisions and “recommended” is the only first term that conveys a lesser degree of strictness. Only “violators” could logically be penalized by losing their federal research grants.

　　下面是一道和SAT官方每日一题相似的题目，供大家练习：

　　Kelly was stunned that her neighbor had the ------- to inquire about borrowing her new snow blower, considering the fact that he had broken her old one.

　　Answer Choices

　　(A) foresight

　　(B) temperament

　　(C) conviction

　　(D) audacity

　　(E) integrity

　　The correct answer is D

　　Explanation

　　The sentence implies that Kelly, in light of her neighbor’s previous behavior, found his actions to be audacious, which means bold or daring.

　　以上就是关于2013年3月21日SAT官方每日一题中阅读完成句子的详细内容，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。