27. -Excuse me, are you going to buy ________ book?

　 -Well, I need it for_________class but it’s too expensive.

　A. the, a　 B. a, the　 　C. a, /　　 D. /, the

答：A。根据答语中的“可判断出是特指的用法，说明谈话双方都知道的那本书。

26. There’s _________ dictionary on________ desk by your side.

　 A. a, the　　　 　　B. a, a　

　C.　 the, a　　　　 D. the, the

答：A。a dictlonary一本词典。the desk为特指。

25. Boris has brains. In fact, I doubt whether anyone in the class has _________ IQ.

　 A. a high　　　　 B. a higher　

　C. the higher　　 　D. the highest

答：B。没有人的智商会比Boris的智商高。the higher，的形式一般用于两者的比较。

24. Jumping out of ___________ airplane at ten thousand feet is quite _________ exciting expe rienee.

　 A. /, the　　　　 B. /, an　　

　 C. an, an　　　　 D.　 the, the

答：C。expemence作“经验”解为不可数名词，但作“经历”解时，前可以加不定冠词。

23. Mr Smith, there’s a man at __________ front door who says he has __________ news for you of great importance.

A. the, /　　　 B. the, the　　

C. /, /　　　　 D. /, the

答：A。at the front door 为特指，指彼此都知道的 front door。news为非特指，news的具体内容并非说话双方都知道的内容。

22. -Where is my blue shirt?

　 -It’s in the washing machine. You have to wear __________ different one.

　 A. any　　 B. the 　C. a　　　 D. other

答：C。a different one; 指不同的一件(另一件)。

21. Four of Robert’s children were at the party, including __________, Luke.

　 A. the oldest　　 B. an oldest one　

　 C. the old　　　 D. an old one

答：A。形容词的最高级之前应用定冠词。

20. He was elected _________ chairman of the students’ union.

A.　 /　　 B. a　 C.　 the　 D. one

答：A。表示人的职务、官衔的词，在句中做主语补足语、宾语补足语、同位语及表语时，前不用冠词。

19. Summers in ___________south of France are for _______ most part dry and sunny.

　 A. /, a　　 　　B. the, /　　　

　C. /, /　　　 D. the, the

答：D。在方位词前加定冠词，the east (west, south, north, left, right), the most相当于the most part of summers.

18. He has been admitted to_________ Qinghua University and I’m sure he will have bright future.

A. /, /　　　 B. the, the　　 C. the, /　 D. /, a

答：D。一般在街道、广场、公园、大学等词前不加冠词。future属抽象名词，前面一般不加冠词。但a bnghc future指“光明的前途、前景”，前面须加不定冠词。