2013年10月18日SAT真题

SAT真题类型：Writing > Improving Sentences 改进句子

　　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.

　　Upon winning her third gold medal at the competition, the young athlete learned that her accomplishments had surpassed her coach’s, a former track star.

　　(A) her coach's

　　(B) her coach

　　(C) those of her coach

　　(D) those done by her coach

　　(E) those of her coach's

解析：Choice (C) is correct. This version of the sentence correctly compares the young athlete’s accomplishments with her coach’s accomplishments, not with her coach. In addition, it uses the plural pronoun “those” to refer to the coach’s accomplishments, which allows the noun “coach” to be correctly modified by the noun phrase “a former track star.” The possessive noun “coach’s” cannot be modified by a noun phrase.

2013年10月19日SAT真题

SAT真题类型：Mathematics > Standard Multiple Choice 数学选择

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

　　In ansolution of water and alcohol, the ratio by mass of water to alcohol isto. Ifgrams of a solution consisting ofgrams water for each gram of alcohol is added to thesolution, what fraction by mass of the new solution is alcohol?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

解析：To find what fraction by mass of the new solution is alcohol, you can find how many grams of alcohol are in the final solution ofgrams. Since thesolution ispart alcohol toparts water, it isalcohol. So it containsgrams of alcohol. Similarly, thesolution isalcohol by mass, so it containsgrams of alcohol. Thus, the finalsolution containsgrams of alcohol, so, or, of it is alcohol.