7. __________of the students in our class are from the north.

　A. Two nineth　 B. Two ninth　

　C. Two ninths　 D.　 Two ninetbs

答：C．分数词的表示法：分子用基数词，分母用序数词，当分子大于l时，分母用复数的形式。9的序数词为ninth。

6.　 There were __________ people in the room.

A. two score of　 　　B. tv0o scores of　　

C. two score　　 　　D. two scores

答：A。score与数词，many，several等词连用时，用单数形式．score后常接of，

如two score of eggs。但scores of 表示笼统的数字，意为“数十个”。

5. Shortly after the accident, __________ policemen were sent to the spot to keep order.

　 A. dozens of　　　 B. dozen　　　

　 C. dozen of　 　　　D. dozen

答：A。dozens of 数十

4. In Pisa, there is________ leaning tower.

　A. an 180-foot-high　　 B. a 180-feet high

　C. a 180-foot-high　　 D. an 180 feet-high

答：C。连字符所连的词做定语时，不用复数形式。

3. In ______ Marx began to learn Russian.

A. the 1870s　　　 B. 1870’s　　　

C. 1870s　　　　 D. his 1870’s

答；A．在“十九世纪七十年代”可以说成in the 1870’s 或 in the 1870s。

2. The hero of the story is an artist in his_______.

A. thirtieth　　　 B. thirty　　　

C. thirty’s　　　 D. thirties

答：D。inone’s twenties (thirties, forties)在某人二(三、四……)十几岁的时候。in one’s teens 在某人十三至十九年龄段的时候。

1. Two___________ died of cold last winter.

A. hundreds old peoples　

B. hundred old people

C. hundreds old people　　　　　　

　D. hundred old peoples

答：B。hundred，thousand，million，score，dozen与数词连用或与many，several等词连用时，不用复数形式。people指人们，本身是具有复数意义的词，但若指不同国家、不同民族的人时，可用复数。如：We should deepen the friendship between the peoples of the two countries.我们应该加深两国人民之间的友谊。

32. I had just started back for the house to change my clothes________ 1 heard voices.

A. as　　　 B. when　　 C. after　　 D. while

答：B。when　 就在那时

31. 1 have a car. I can take you______ you want to go.

A. whatever　 　B. wherever　

C. however　 　　D. whichever

答：B。wherever无论何地，引导的是地点状语从句。

30. Excuse me for interrupting you, _____I have some questions to ask.

A. so　　　 B. and　　　 C. yet　　　 D. but

答：B。D.