11.The surroundings of his office building------ far from clean.

　　A. are B. is C. has been D. do (A)

　　见第6题。

　　12. The doctor checked up both Wang’s () hearts.

　　A. father-in-law’s and his brother-in-law’s B. father’s-in-law and his brother’s-in-law

　　C. father-in-law and his brother-in-law D. father-in-laws’ and his brother-in-laws’ (A)

　　见第5题。

　　13. I had my hair cut at the () around the corner.

　　A. barber B. barbers C. barber’s D. barbers’ (C)

　　`s后的名词如指商店、家宅时，名词可省略，如上：在理发店;at the doctor`s :在诊所;

　　14. The woman over there is() .

　　A. Julia and Mary mother B. Julia and Mary’s mother

　　C. Julia’s and Mary’s mother D. Julia’s and Mary mother (B)

　　表示各自的所有关系时，名词末尾均须加 `s , 如A`s and B`s bedrooms ; 表示他们共同的关系时，

　　仅在最后一词尾加`s , 如上;

　　15. Only last month I called at () .

　　A. my uncle B. my uncle’s C. my uncles D. mine uncle (B)

　　见第13题;

　　16. The students must finish the test in () .

　　A. three quarters of an hour time B. three quarter’s of an hour time

　　C. three quarters of an hour’s time D. three quarters’ of an hour’s time (C)

　　of+`s 的复合结构，又如：a friend of my brother`s 我兄弟的一个朋友。

　　17. His article is better than() in the class.

　　A. anyone’s else B. anyone else C. anyone’s else’s D. anyone else’s (D)

　　18. He is very tired. He needs () .

　　A. a night rest B. rest of a night C. a rest night D. a night’s rest (D)

　　’s属格和of属格用法的区别：’s 表有生命的，也表时间(如上)、自然现象(如第19题)、度量衡、

　　国家、城市;用of 表示无生命的，抽象的，或修饰语较多的;

　　19. () is covered with heavy snow.

　　A. The earth’s surface B. The surface of earth

　　C. The surface earth D. The earth surface (A)

　　20. This question is too difficult, and everyone is () to solve it.

　　A. at his wits’ end B. at one’s wits end

　　C. in his wits’ end D. out of his wits end (A)

　　固定词组，必须用 ’s 。 如第20题：不知所措，又如：in one’s mind’s eye 在某人的心目中