1. educating patients about receiving surgical procedures is becoming an important issue, ( ) it can reduce anxiety and uncertainty while helping to hasten decisions for undergoing time sensitive surgeries.

　　a. therefore

　　b. as

　　c. if

　　d. however

　　【答案】b。教育病人接受外科手术正成为一个重要的问题，因为它可以减少焦虑和不确定性，同时有助于加快进行时间敏感手术的决定。a意为“因此”;b意为“因为”;c意为“如果”;d意为“然而”。故正确选项为b。

　　2. the ( ) of their years of education was 10.96 with a minimum of 7 and a maximum of 17.

　　a. mean

　　b. median

　　c. mode

　　d average

　　【答案】d。他们的平均受教育年限为10.96年，最低为7年，最高为17年。从词意判断，a选项“手段、意义”;b选项“媒体、介质”;c选项“模式”;d选项“平均”。故正确选项为d。

　　3. like no previous technology, mobile technology has spread ( ) an unprecedented pace in the last few years.

　　a. at

　　b. in

　　c. on

　　d. with

　　【答案】a。以前没有任何一项技术普及速度像移动技术那么快。at an unprecedented pace为固定搭配，意为“以前所未有的步伐/速度”。故正确选项为a。

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