答案　A　[句意：芝加哥去年的犯罪率大幅度下降。decline表示"下降"时，可用于数目、标准、影响、力量等对象。lessen意为"减少"，主要指规格、价值、重要性等变小。]

7．Many graduates in China do their best to go abroad to seek their ________.

　　A．luck B．chance C．fortune D．fate

答案　C　[句意：在中国，许多毕业生尽其所能到国外去寻找财富。seek one's fortune寻找致富或成功之路。]

8．The boy was________in the middle of his call because he had no more coins to put in the box.

　　A．cut off B．broken in

　　C．hung up D．put down

答案　A　[句意：因为没有更多硬币投入电话盒，那个男孩打电话过程中就被中断了。cut off"切断"，符合句意。break in闯入；hang up挂断电话；put down放下。]

9．We should consider the students' request________the school library provide more books on popular science.

　　A．that B．when

　　C．which D．where

答案　A　[考查同位语从句。句意：我们应该考虑学生们的要求--校图书馆应提供更多的科普读物。that引导同位语从句，既没有意义，也不作成分。]

10．In communication，a smile is usually ________strong sign of a friendly and ________open attitude.

　　A．the；/ B．a；an C．a；/ D．the；an

答案　C　[句意：在交流中，微笑通常是友好、坦诚态度的一种明显标志。a strong sign一种明显标志，open与friendly并列修饰attitude。]

11．There was nobody ________when the man came round the corner.

　　A．out of sight B．at sight

　　C．lose sight D．in sight

答案　D　[句意：当这个人拐过墙角的时候，没有看到任何人。in sight看得见，视野之内。]

12．I was telling them about my exciting travels，when he ________with a story of his own.

　　A．broke down B．broke off

C．broke in D．broke up