Question of the Day. Can you answer today's question? 这就是SAT考试官网collegeboard的每日一题的训练。SAT考试不像托福、雅思或者GRE、GMAT考试，会有回忆机经，因此官网上的SAT真题就显得尤为重要。SAT考试官方每日一题可以让你熟悉SAT考试的出题方向及出题规律，有很大的参考价值，是每一位SAT考生都需要的备考资料。

　　楷维留学小编为大家整理SAT考试官方真题每日一题解析，此次整理2014年6月17日、6月18日、6月19日、6月20日、6月21日SAT官网每日一题。希望对大家备考SAT考试有所帮助。

2014年6月17日SAT真题

　　Writing > Identifying Sentence Errors 句子改错

　　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.

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

2014年6月17日SAT考试官方每日一题答案：A

解析：The error in this sentence occurs at (A), where an inappropriate verb form makes the sentence a fragment. The verb “fall” should be used in place of “falling.”

2014年6月18日SAT真题

　　Mathematics > Standard Multiple Choice 数学选择

　　Read the following SAT test question and then click on a button to select your answer.

　　for all integers

　　Ifis a function defined for all positive integers, andsatisfies the two conditions above, which of the following could be the definition of?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

2014年6月18日SAT考试官方每日一题答案：B

解析：If , then , so the second condition fails. If , then , so the second condition fails for this function also. The other three options satisfy , so it remains to check whether they satisfy the first condition.

If , and , then and , so it is not true that for all integers . This means that the function does not satisfy the first condition. If , and , then and , so it is not true that for all integers . This means that the function does not satisfy the first condition.

However, if , then , for all integers . Also, . Therefore, the function is the only option that satisfies both conditions.