1.Luckily, Smith brought a map, ( ) we would have got lost.

　　A. that

　　B. of which

　　C. without which

　　D. which

　　【答案】C。Which指代先行词map作为without的宾语。句意：幸运的是Smith买了一张地图，没有它我们就会迷路。

　　2.Before a problem can be solved, it must be obvious ( ) the problem itself is.

　　A. what

　　B. that

　　C. which

　　D. why

　　【答案】A。考查主语从句。“在解决问题之前，一定要弄清楚问题是什么”。It作形式主语，后面连接真正的主语，从句中缺表语，排除B和D;又因题目没有给出problem的范围，故选A。

　　3.The Rio Blue jacket comes with a special shaped pocket that prevents loose coins from ( ) out.

　　A. drop

　　B. drops

　　C. dropped

　　D. dropping

　　【答案】D。考查动词短语。prevent sb from doing sth“阻止做某事”。ABC选项均不符合prevent的搭配，排除;故答案选D。

　　4.Fewer than ten accounting firms in the country have received the Barstow Award ( ) excellence in customer service.

　　A. to

　　B. for

　　C. at

　　D. with

　　【答案】B。考查介词。“该国有不到十所会计事务所曾获得巴斯托奖，因为它们在顾客服务领域的卓越表现。”选项介词中，只有for有表示“原因”的意思。A项：to一般用来表方向、目的等;C项：at通常与时间、地点连用;D项：with意为“和”或“随着”。

　　5.The ( ) of climbing to the top of the corporate ladder is best defined in the new book published by Scott Thompson, one of the most successful businessmen in history.

　　A. challenge

　　B. dimension

　　C. introduction

　　D. compassion

　　【答案】A。考查词汇辨析。A项：挑战;B项：维度、尺寸;C项：介绍、说明书;D项：同情。根据题意，“晋升到公司最高职位的挑战，选择challenge。《爬上公司的阶梯》这本书是史上最成功的商人之一，斯科特·汤普森出版的新书中最能说明问题的”，A项challenge“挑战”更符合原文，故答案选A。